Document:

<PAGE>

                                                                   EXHIBIT 10.15

                      SUPPLEMENTAL SHAREHOLDERS AGREEMENT
                      -----------------------------------

     THIS SUPPLEMENTAL SHAREHOLDERS AGREEMENT (the "Agreement") is made and
entered into as of the 11th day of April, 2000 by and among  DeskTalk Systems,
Inc., a California corporation (the "Company"), the parties whose names are set
forth on Schedule I (individually, an "Investor" and collectively, the
         ----------
"Investors"), certain shareholders as set forth on Schedule II (individually, a
                                                   -----------
"Management Shareholder" and collectively, the "Management Shareholders") and
Geocapital IV, L.P. (the "Other Shareholder").

     WHEREAS, the Investors are acquiring on the date hereof shares of Series D
Preferred Stock, no par value per share, of the Company pursuant to the terms of
the Series D Preferred Stock Purchase Agreement of even date herewith between
the Company and the Investors (the "Series D Preferred Stock Purchase
Agreement");

     WHEREAS, the Management Shareholders, the Other Shareholder and the
Investors desire to enter into this Agreement for the purposes of (i) limiting
the manner and terms by which the shares held by the Management Shareholders may
be transferred; and (ii) stipulating events the occurrence of which will require
the Management Shareholders, the Other Shareholder and the Investors to vote
their shares in the same manner as certain other shareholders;

     NOW, THEREFORE, in consideration of the foregoing recitals and the mutual
covenants, agreements, representations and warranties contained in this
Agreement, and other good and valuable consideration, the receipt of which is
hereby acknowledged, the parties hereto agree as follows:

     1.   Retention of Management Shares.  Unless otherwise approved in writing
          ------------------------------
by a majority of the holders of the Series D Preferred Shares, no Management
Shareholder shall sell, exchange, transfer or otherwise dispose (a "Transfer")
of any interest in his shares (the "Management Shares") prior to April 10, 2002,
except:  (i) pursuant to a Qualified Public Offering (as defined in the First
Amended and Restated Shareholders Agreement of even date herewith by and among
the Company and certain shareholders of the Company (the "Shareholders
Agreement"); (ii) pursuant to an Approved Sale (defined below) of the Company;
(iii) subsequent to termination of a Management Shareholder without Cause (as
defined below); (iv) to the extent necessary to fund payment of a post-
termination option exercise and any taxes related thereto; or (v) pursuant to a
Change of Control (as defined below) ; provided, however, that nothing in this
                                       ------------------
paragraph shall prohibit any Management Shareholder from transferring Management
Shares pursuant to a transaction described in Section 2.4 of the Shareholders
Agreement.

     "Cause" means (a) with respect to any Management Shareholder with an
employment agreement that defines "Cause," the definition set forth in such
employment agreement and (b) with respect to any other Management Shareholder,
(i) such Management Shareholder's (1) willful failure to timely comply in all
material respects with the lawful directives of the Company's Board of Directors
(the "Board") (as set at a meeting of the Board in accordance with the Company's
bylaws) or such Management Shareholder's supervisory personnel (provided
<PAGE>

such directives are consistent with such Management Shareholder's position with
the Company) or (2) gross negligence or willful misconduct in the performance of
the material duties or responsibilities of his or her position with the Company
or any subsidiary; (ii) reasonable evidence to indicate that such Management
Shareholder has committed (1) any felony, (2) any other criminal act or act of
material dishonesty, disloyalty, or misconduct (other than minor traffic
offenses and similar acts) or (3) any act of moral turpitude that is materially
injurious to the property, operations, business or reputation of the Company or
its subsidiaries (as determined by the Board in its reasonable good faith
discretion); (iii) the use or imparting by such Management Shareholder of any
material confidential or proprietary information of the Company or any
subsidiary in violation of any confidentiality or proprietary agreement to which
such Management Shareholder is a party; or (iv) such Management Shareholder's
willful failure to comply in any material respect with the terms of any option
plans of the Company or the Shareholders Agreement.

     2.   Sale of the Company/Change of Control.
          -------------------------------------

          (a)  Subject to the provisions of Section 6(xii) of the Company's
Second Amended and Restated Articles of Incorporation, if at any time prior to
an Initial Public Offering, a majority of the holders of each of the Series B
and D Preferred Shares (the "Majority Sellers"), approve a sale of all or
substantially all of the Company's assets determined on a consolidated basis or
a sale of more than 50% of the Company's outstanding capital stock (whether by
merger, recapitalization, consolidation, reorganization, combination or
otherwise) (collectively, an "Approved Sale") to any person or entity which is
not, and following such sale will not be, affiliated with any such Majority
Sellers, the Management Shareholders, the Investors and the Other Shareholders
shall vote for, consent to and raise no objections against such Approved Sale.
If the Approved Sale is structured as (i) a merger or consolidation, such other
Management Shareholders, Investors, and Other Shareholders shall waive any
dissenter's rights, appraisal rights or similar rights in connection with such
merger or consolidation or (ii) a sale of stock, such other Management
Shareholders and Investors shall agree to sell all of their Shares and rights to
acquire Shares on the terms and conditions approved by, and applicable to the
Shares held by, the Majority Sellers.  Such other Management Shareholders,
Investors and Other Shareholders shall take all necessary or desirable action,
as requested by the Majority Sellers, to cause the consummation of the Approved
Sale on the terms proposed by the Majority Sellers.

          (b)  A "Change in Control" will be deemed to have taken place when one
of the following occurs:

                                       2
<PAGE>

               (i)  any person or group of related or affiliated persons shall
     have become the beneficial owner or owners of 51% or more of the
     outstanding voting stock of the Corporation; or

               (ii) there shall have occurred a merger or consolidation in which
     the Corporation is not the survivor or in which holders of the common stock
     of the Corporation shall have become entitled to receive cash, securities
     of the Corporation other than voting common stock or securities of any
     other person.

     3.   Failed Redemption; Default of Indebtedness.
          ------------------------------------------

          (a) In the event of a failure by the Company for more than one year to
redeem the Investors' Shares as required in the Company's Second Amended and
Restated Articles of Incorporation, the Management Shareholders shall agree to
vote their Management Shares in the same manner as that of two thirds of the
aggregate holders of the Series B, C, and D Preferred Shares (as defined in the
Shareholders Agreement) until the required redemption is effected.

          (b) In the event of a material default by the Company on any of its
Indebtedness (as defined in the Series D Preferred Stock Purchase Agreement)
exceeding $1,000,000 in value, the Management Shareholders shall, if the Company
is unable within a three-month period to cure the default, agree to vote their
Management Shares in the same manner as that of two thirds of the aggregate
holders of the Series B, C, and D Preferred Shares until the default is cured.

     4.   Transfers in Violation of Agreement.  Any Transfer or attempted
          -----------------------------------
Transfer of any Management Shares in violation of any provision of this
Agreement shall be void, and the Company shall not record such Transfer on its
books or treat any purported transferee of such Management Shares as the owner
of such shares for any purpose.

     5.   Severability.  Whenever possible, each provision of this Agreement
          ------------
shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Agreement is held to be invalid,
illegal or unenforceable in any respect under any applicable law or rule in any
                                                                            ---
jurisdiction, such invalidity, illegality or unenforceability shall not affect
the validity, legality or enforceability of any other provision of this
Agreement in such jurisdiction or affect the validity, legality or
enforceability of any provision in any other jurisdiction, but this Agreement
shall be reformed, construed and enforced in such jurisdiction as if such
invalid, illegal or unenforceable provision had never been contained herein.

     6.   Entire Agreement.  Except as otherwise expressly set forth herein,
          ----------------
this Agreement embodies the complete agreement and understanding among the
parties hereto with respect to the subject matter hereof and supersedes and
                                                             ----------
preempts any prior understandings, agreements or representations by or among the
parties, written or oral, which may have related to the subject matter hereof in
any way.

                                       3
<PAGE>

     7.   Successors and Assigns.  Except as otherwise provided herein, this
          ----------------------
Agreement shall bind and inure to the benefit of and be enforceable by the
Company, the Investors, the Management Shareholders, and the Other Shareholder
and the respective successors and assigns of each of them (other than a
transferee of Management Shares in a transaction permitted by Section 1 hereof).

     8.   Counterparts.  This Agreement may be executed in multiple
          ------------
counterparts, each of which shall be an original and all of which taken together
shall constitute one and the same agreement.

     9.   Remedies.  The Company, the Investors and the Management Shareholders
          --------
shall be entitled to enforce their rights under this Agreement specifically, to
recover damages by reason of any breach of any provision of this Agreement and
to exercise all other rights existing in their favor.  The parties hereto agree
and acknowledge that money damages would not be an adequate remedy for any
breach of the provisions of this Agreement and that the Company, any Investor
and any Management Shareholder may in its sole discretion apply to any court of
law or equity of competent jurisdiction for specific performance and/or
injunctive relief (without posting a bond or other security) in order to enforce
or prevent any violation of the provisions of this Agreement.

     10.  Notices.  Any notice provided for in this Agreement shall be in
          -------
writing and shall be either personally delivered, or mailed first class mail
(postage prepaid) or sent by reputable overnight courier service (charges
prepaid) to the Company at the address set forth below and to any other
recipient at the address indicated on the schedules hereto and to any subsequent
holder of Management Shares subject to this Agreement at such address as
indicated by the Company's records, or at such address or to the attention of
such other person as the recipient party has specified by prior written notice
to the sending party.  Notices shall be deemed to have been given hereunder when
delivered personally, three days after deposit in the U.S. mail and one day
after deposit with a reputable overnight courier service.  The Company's address
is:

               Attention: Paul Madick
               19191 South Vermont, 9th Floor
               Torrance, CA 90502
               Fax: (310) 323-6197

     11.  Governing Law.  This Agreement shall be construed in accordance with
          -------------
and governed by the laws of the State of California without giving effect to any
choice of law or conflict of law rules.

     12.  Descriptive Headings.  The descriptive headings of this Agreement are
          --------------------
inserted for convenience only and do not constitute a part of this Agreement.

                                       4
<PAGE>

                           [SIGNATURE PAGE FOLLOWS]

                                       5
<PAGE>

IN WITNESS WHEREOF, the parties hereto have executed this Agreement on the day
and year first above written.

"COMPANY"
                                    DESKTALK SYSTEMS, INC., a California
                                    corporation

                                    By:  /s/ David P. Woodall
                                         Name: David P. Woodall
                                         Title: President

"MANAGEMENT SHAREHOLDERS"

                                    /s/ David J. Kaufman
                                    David J. Kaufman

                                    /s/ David P. Woodall
                                    David P. Woodall

                                    /s/ Joseph M. Feig
                                    Joseph M. Feig

"INVESTORS"
                                    DTALK ACQUISITION CORP.,
                                    a Delaware corporation

                                    By:  /s/ Bodil Arlander
                                    Name:  Bodil Arlander
                                    Its:  Vice President

                                       6
<PAGE>

                                    SIGNAL EQUITY PARTNERS, L.P.
                                    By:  Signal Equity Advisors, L.P.,
                                         its General Partner
                                    By:  Signal Equity Advisors, Inc.,
                                         its General Partner

                                    By:  /s/ Charles T. Lake II
                                    Name:  Charles T. Lake II
                                    Its: VP

"OTHER SHAREHOLDER"
                                    GEOCAPITAL IV, L.P.

                                    By:  GEOCAPITAL IV MANAGEMENT, L.P.

                                    By:/s/ Stephen J. Clearman
                                            General Partner

                                       7
<PAGE>

                                  SCHEDULE I
                                  ----------

                                   INVESTORS

DTalk Acquisition Corp.
c/o The Bear Stearns Companies Inc.
245 Park AvenueNew York, New York  10167
Attention:  John D. Howard

Signal Equity Partners, L.P.
10 East 53rd Street, 32nd Floor
New York, New York  10022
Attention:  Timothy Bradley

                                       8
<PAGE>

                                  SCHEDULE II
                                  -----------

                            MANAGEMENT SHAREHOLDERS

David J. Kaufman

C/O Desktalk Systems, Inc.
19191 S. Vermont Avenue, 9th Floor
Torrance, CA.  90502

David P. Woodall
C/O Desktalk Systems, Inc.
19191 S. Vermont Avenue, 9th Floor
Torrance, CA.  90502

Joseph M. Feig
C/O Desktalk Systems, Inc.
19191 S. Vermont Avenue, 9th Floor
Torrance, CA.  90502

                                       9<PAGE>

                                                                   EXHIBIT 10.16

THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUABLE UPON THE EXERCISE HEREOF
HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY
APPLICABLE STATE SECURITIES LAWS AND MAY NOT BE SOLD OR TRANSFERRED UNLESS SUCH
SALE OR TRANSFER IS IN ACCORDANCE WITH THE REGISTRATION REQUIREMENTS OF SUCH ACT
AND APPLICABLE LAWS OR SOME OTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS
OF SUCH ACT AND APPLICABLE LAWS IS AVAILABLE WITH RESPECT THERETO.

                         COMMON STOCK PURCHASE WARRANT

Warrant No. 5                                           Number of Shares  63,560

                            DESKTALK SYSTEMS, INC.

                            Void after May 1, 2005

     1.   Issuance. This Warrant is issued to Geocapital IV, L.P. by DeskTalk
          --------
Systems, Inc., a California corporation (hereinafter with its successors called
the "Company").

     2.   Purchase Price: Number of Shares. Subject to the terms and conditions
          --------------------------------
hereinafter set forth, the registered holder of this Warrant (the "Holder"),
commencing on May 1, 1998 (the "Issue Date"), is entitled upon surrender of
this Warrant, with the subscription form annexed hereto duly executed, at the
office of the Company, 19401 South Vermont Avenue, Torrance, California 90502,
or such other office as the Company shall notify the Holder of in writing, to
purchase from the Company at a purchase price of $2.36 per share (the "Purchase
Price") up to an aggregate of 63,560 fully paid and nonassessable shares of
common stock, no par value, of the Company (the "Common Stock"). Until such time
as this Warrant is exercised in full or expires, the Purchase Price and the
number of shares of Common Stock issuable upon exercise of this Warrant are
subject to adjustment as hereinafter provided.

     3.   Payment of Purchase Price. The Purchase Price may be paid (i) in cash
          -------------------------
or by check, (ii) by the surrender by the Holder to the Company of any
promissory notes or other obligations issued by the Company, with all such notes
and obligations so surrendered being credited against the Purchase Price in an
amount equal to the principal amount thereof plus accrued interest to the date
of surrender, (iii) through delivery by the Holder to the Company of
<PAGE>

other securities issued by the Company, with such securities being credited
against the Purchase Price in an amount equal to the fair market value thereof,
as determined in good faith by the Board of Directors of the Company (the
"Board"), or (iv) by any combination of the foregoing. The Board shall promptly
respond in writing to an inquiry by the Holder as to the fair market value of
any securities the Holder may wish to deliver to the Company pursuant to clause
(iii) above.

     4.     Net Issue Election. The Holder may elect to receive, without the
            ------------------
payment by the Holder of any additional consideration, shares equal to the value
of this Warrant or any portion hereof by the surrender of this Warrant or such
portion to the Company, with the net issue election notice annexed hereto duly
executed, at the office of the Company. Thereupon, the Company shall issue to
the Holder such number of fully paid and nonassessable shares of Common Stock as
is computed using the following formula:

                             X = Y (A-B)
                                 -------
                                    A

where X =  the number of shares to be issued to the Holder pursuant to this
Section 4.

           Y =  the number of shares covered by this Warrant in respect of which
           the net issue election is made pursuant to this Section 4.

           A =  the fair market value of one share of Common Stock, as
           determined in good faith by the Board, as at the time the net issue
           election is made pursuant to this Section 4.

           B =  the Purchase Price in effect under this Warrant at the time the
           net issue election is made pursuant to this Section 4.

The Board shall promptly respond in writing to an inquiry by the Holder as to
the fair market value of one share of Common Stock.

     5.     Partial Exercise. This Warrant may be exercised in part at the
            ----------------
discretion of the Holder, and the Holder shall be entitled to receive a new
warrant, which shall be dated as of the date of this Warrant, covering the
number of shares in respect of which this Warrant shall not have been exercised.

     6.     Issuance Date. The person or persons in whose name or names any
            -------------
certificate representing shares of Common Stock is issued hereunder shall be
deemed to have become the holder of record of the shares represented thereby as
at the close of business on the date this Warrant is exercised with respect to
such shares, whether or not the transfer books of the Company shall be closed.

                                      -2-
<PAGE>

     7.   Expiration Date: Automatic Exercise. This Warrant shall expire on May
          -----------------------------------
1, 2005 and shall be void thereafter. Notwithstanding the foregoing, this
Warrant shall automatically be deemed to be exercised in full pursuant to the
provisions of Section 4 hereof, without any further action on behalf of the
Holder, immediately prior to the time this Warrant would otherwise expire
pursuant to the preceding sentence.

     8.   Reserved Shares: Valid Issuance. The Company covenants that it will at
          -------------------------------
all times from and after the date hereof reserve and keep available such number
of its authorized shares of Common Stock, free from all preemptive or similar
rights therein, as will be sufficient to permit the exercise of this Warrant in
full. The Company further covenants that such shares as may be issued pursuant
to the exercise of this Warrant will, upon issuance, be duly and validly issued,
fully paid and nonassessable, and free from all taxes, liens, and charges with
respect to the issuance thereof.

     9.   Dividends. If after the Issue Date the Company shall subdivide the
          ---------
Common Stock, by split-up or otherwise, or combine the Common Stock, or issue
additional shares of Common Stock in payment of a stock dividend on the Common
Stock, the number of shares issuable on the exercise of this Warrant shall
forthwith be proportionately increased in the case of a subdivision or stock
dividend, or proportionately decreased in the case of a combination, and the
Purchase Price shall forthwith be proportionately decreased in the case of a
subdivision or stock dividend, or proportionately increased in the case of a
combination.

     10.  Mergers and Reclassifications. If after the Issue Date there shall be
          -----------------------------
any reclassification, capital reorganization, or change of the Common Stock
(other than as a result of a subdivision, combination, or stock dividend
provided for in Section 9 hereof), or any consolidation of the Company with, or
merger of the Company into, another corporation or other business organization
(other than a consolidation or merger in which the Company is the continuing
corporation and which does not result in any reclassification or change of the
outstanding Common Stock), or any sale or conveyance to another corporation or
other business organization of all or substantially all of the assets of the
Company, then, as a condition of such reclassification, reorganization, change,
consolidation, merger, sale, or conveyance, lawful provisions shall be made and
duly executed documents evidencing the same from the Company or its successor
shall be delivered to the Holder, so that the Holder shall thereafter have the
right to purchase, at a total price not to exceed that payable upon the exercise
of this Warrant in full, the kind and amount of shares of stock and other
securities and property receivable upon such reclassification, reorganization,
change, consolidation, merger, sale, or conveyance by a holder of the number of
shares of Common Stock which might have been purchased by the Holder immediately
prior to such reclassification, reorganization, change, consolidation, merger,
sale, or conveyance, and in any such case appropriate provisions shall be made
with respect to the rights and interest of the Holder to the end that the
provisions hereof (including without limitation, provisions for the adjustment
of the Purchase Price and the number of shares issuable hereunder) shall
thereafter be applicable in relation to any shares of stock or other securities
and property thereafter deliverable upon exercise hereof.

                                      -3-
<PAGE>

     11.  Adjustments for Issuances Below Purchase Price. In case the Company
          ----------------------------------------------
shall at any time or from time to time after the Issue Date issue or sell any
shares of Common Stock for a consideration per share less than the Purchase
Price in effect for this Warrant immediately prior to the time of such issue or
sale, or pay any dividend or make any other distribution upon the Common Stock
payable in cash, property, or securities of the Company other than Common Stock,
or in securities of a corporation other than the Company, then forthwith upon
such issue or sale, or upon the payment of such dividend or the making of such
other distribution, as the case may be, the Purchase Price shall (until another
such issue or sale, or dividend or other distribution) be reduced to a price
(calculated to the nearest cent) determined by dividing (i) an amount equal to
the sum of(X) the number of shares of Common Stock outstanding immediately prior
to such issue or sale or the payment of such dividend or the making of such
other distribution, multiplied by the Purchase Price in effect immediately prior
to such event plus (Y) the consideration, if any, received by the Company upon
such issue or sale minus (Z) the amount of such dividend or other distribution
in respect of Common Stock, by (ii) the total number of shares of Common Stock
outstanding immediately after such issue or sale or dividend or other
distribution. Further, the number of shares purchasable hereunder shall be
increased to a number determined by dividing (i) the number of shares
purchasable hereunder immediately prior to such issue or sale or dividend or
other distribution, multiplied by the Purchase Price hereunder immediately prior
to such event, by (ii) the Purchase Price in effect immediately after the
foregoing adjustment. The provisions of this Section 11 shall not apply to (i)
shares issued in transactions to which Sections 9 or 10 of this Warrant apply;
(ii) shares of Common Stock (appropriately adjusted for subdivisions,
combinations, stock dividends, and the like) or rights to subscribe for or to
purchase shares of Common Stock or options for the purchase of shares of Common
Stock (appropriately adjusted for subdivisions, combinations, stock dividends,
and the like) offered, granted, or issued to employees, officers, directors, or
consultants of the Company in connection with their service to the Company, plus
such number of shares of Common Stock (as so adjusted) which are repurchased by
the Company from such persons after the Issue Date pursuant to contractual
rights held by the Company and at repurchase prices not exceeding the respective
original purchase prices paid by such persons to the Company therefor.

          For the purpose of this Section 11, the following provisions shall
also be applicable:

      A.  In case the Company shall in any manner offer any rights to subscribe
    for or to purchase shares of Common Stock, or grant any options for the
    purchase of shares of Common Stock, at a price less than the Purchase Price
    in effect immediately prior to the time of the offering of such rights or
    the granting of such options, as the case may be, all shares of Common Stock
    which the holders of such rights or options shall be entitled to subscribe
    for or purchase pursuant to such rights or options shall be deemed to be
    issued or sold as of the date of the offering of such rights or the granting
    of such options, as the case may be, and the minimum aggregate consideration
    named in such rights or options for the Common Stock covered thereby, plus
    the consideration received by the Company for such rights or options, shall
    be deemed to be the consideration actually received by the Company

                                      -4-
<PAGE>

     (as of the date of the offering of such rights or the granting of such
     options, as the case may be) for the issue or sale of such shares.

          B. In case the Company shall in any manner issue or sell any shares of
     any class or obligations directly or indirectly convertible into or
     exchangeable for shares of Common Stock and the price per share for which
     Common Stock is deliverable upon such conversion or exchange (determined by
     dividing (i) the total minimum amount received or receivable by the Company
     in consideration of the issue or sale of such convertible or exchangeable
     shares or obligations, plus the total minimum amount of premiums, if any,
     payable to the Company upon conversion or exchange, by (ii) the total
     number of shares of Common Stock necessary to effect the conversion or
     exchange of all such convertible or exchangeable shares or obligations)
     shall be less than the Purchase Price in effect immediately prior to the
     time of such issue or sale, then such issue or sale shall be deemed to be
     an issue or sale (as of the date of issue or sale of such convertible or
     exchangeable shares or obligations) of the total maximum number of shares
     of Common Stock necessary to effect the conversion or exchange of all such
     convertible or exchangeable shares or obligations, and the total minimum
     amount received or receivable by the Company in consideration of the issue
     or sale of such convertible or exchangeable shares or obligations, plus the
     total minimum amount of premiums, if any, payable to the Company upon
     exchange or conversion, shall be deemed to be the consideration actually
     received (as of the date of the issue or sale of such convertible or
     exchangeable shares or obligations) for the issue or sale of such Common
     Stock.

          C. In the case of any dividend or other distribution on the Common
     Stock of the Company payable in property, securities of the Company other
     than Common Stock or securities of a corporation other than the Company,
     such dividend or other distribution shall be deemed to have been paid or
     made at a value equal to the fair value of the property or securities so
     distributed. Any dividend or distribution referred to in this Subsection C
     shall be deemed to have been paid or made on the day following the date
     fixed for the determination of stockholders entitled to receive such
     dividend or distribution.

          D. In determining the amount of consideration received by the Company
     for Common Stock, securities convertible thereinto, or exchangeable
     therefor, or rights or options for the purchase thereof, no deduction shall
     be made for expenses or underwriting discounts or commissions paid by the
     Company. The Board shall determine in good faith the fair value of the
     amount of consideration other than money received by the Company upon the
     issue by it of any of its securities. The Board shall also determine in
     good faith the fair value of any dividend or other distribution made upon
     Common Stock payable in property, securities of the Company other than
     Common Stock or securities of a corporation other than the Company. The
     Board shall, in case any Common Stock, securities convertible thereinto or
     exchangeable therefor, or rights or options for the purchase thereof are
     issued with other stock, securities or assets of the Company, determine in
     good faith what part of the consideration received therefor is applicable
     to the issue of the Common

                                      -5-
<PAGE>

     Stock, securities convertible thereinto or exchangeable therefor, or rights
     or options for the purchase thereof.

       E.   If there shall be any change in (i) the minimum aggregate
     consideration named in the rights or options referred to in Subsection A
     above, (ii) the consideration received by the Company for such rights or
     options, (iii) the price per share for which Common Stock is deliverable
     upon the conversion or exchange of the convertible or exchangeable shares
     or obligations referred to in Subsection B above, (iv) the number of shares
     which may be subscribed for or purchased pursuant to the rights or options
     referred to in Subsection A above, or (v) the rate at which the convertible
     or exchangeable shares or obligations referred to in Subsection B above are
     convertible into or exchangeable for Common Stock, then the Purchase Price
     in effect at the time of such event shall be readjusted to the Purchase
     Price which would have been in effect at such time had such rights,
     options, or convertible or exchangeable shares or obligations still
     outstanding provided for such changed consideration, price per share,
     number of shares, or rate of conversion or exchange, as the case may be, at
     the time initially offered, granted, issued or sold, but only if as a
     result of such adjustment the Purchase Price then in effect hereunder is
     thereby reduced.

       12.  Fractional Shares. In no event shall any fractional share of Common
            -----------------
Stock be issued upon any exercise of this Warrant. If, upon exercise of this
Warrant as an entirety, the Holder would, except as provided in this Section 12,
be entitled to receive a fractional share of Common Stock, then the Company
shall issue the next higher number of full shares of Common Stock, issuing a
full share with respect to such fractional share.

       13.  Certificate of Adjustment. Whenever the Purchase Price is adjusted,
            -------------------------
as herein provided, the Company shall promptly deliver to the Holder a
certificate setting forth the Purchase Price after such adjustment and setting
forth a brief statement of the facts requiring such adjustment.

       14.  Notices of Record Date, Etc. In the event of:
            ---------------------------

       (a)  any taking by the Company of a record of the holders of any class of
     securities for the purpose of determining the holders thereof who are
     entitled to receive any dividend or other distribution, or any right to
     subscribe for, purchase or otherwise acquire any shares of stock of any
     class or any other securities or property, or to receive any other right,

       (b)  any reclassification of the capital stock of the Company, capital
     reorganization of the Company, consolidation or merger involving the
     Company, or sale or conveyance of all or substantially all of its assets,
     or

       (c)  any voluntary or involuntary dissolution, liquidation, or winding-up
     of the Company,

                                      -6-
<PAGE>

then and in each such event the Company will mail or cause to be mailed to the
Holder a notice specifying (i) the date on which any such record is to be taken
for the purpose of such dividend, distribution or right, and stating the amount
and character of such dividend, distribution or right, or (ii) the date on which
any such reclassification, reorganization, consolidation, merger, sale or
conveyance, dissolution, liquidation, or winding-up is to take place, and the
time, if any is to be fixed, as of which the holders of record in respect of
such event are to be determined. Such notice shall be mailed at least twenty
(20) days prior to the date specified in such notice on which any such action is
to be taken.

     15.  Amendment. The terms of this Warrant may be amended, modified, or
          ---------
waived only with the written consent of the Company and the holders of Warrants
representing at least two-thirds of the total number of shares of Common Stock
then issuable upon the exercise of this Warrant or any new warrants issued to
replace this Warrant. No such amendment, modification or waiver shall be
effective as to this Warrant unless the terms of such amendment, modification or
waiver shall apply with the same force and effect to all of the other Warrants
then outstanding.

     16.  Transfers: Warrant Register: Etc,
          ---------------------------------

     A.   Subject to compliance with applicable federal and state securities
   laws and receipt of an opinion satisfactory to the Company, this Warrant may
   be transferred by the Holder with respect to any or all of the shares
   purchasable hereunder. Upon surrender of this Warrant to the Company and
   receipt of an opinion satisfactory to the Company, together with the
   assignment hereof properly endorsed, for transfer of this Warrant as an
   entirety by the Holder, the Company shall issue a new warrant of the same
   denomination to the assignee. Upon surrender of this Warrant to the Company,
   together with the assignment hereof properly endorsed, by the Holder for
   transfer with respect to a portion of the shares of Common Stock purchasable
   hereunder, the Company shall issue a new warrant to the assignee
   (collectively with the Holder, the "Holders"), in such denomination as shall
   be requested by the Holder hereof, and shall issue to such Holder a new
   warrant covering the number of shares in respect of which this Warrant shall
   not have been transferred (such new warrant, in combination with the Warrant,
   hereinafter referred to as the "Warrants"). Holders of the Warrants shall be
   entitled to the same rights and privileges as the Holder of this Warrant.

      B.  The Company will maintain a register containing the names and
   addresses of the Holders of the Warrants. The Holders may change their
   addresses as shown on the warrant register by written notice to the Company
   requesting such change. Any notice or written communication required or
   permitted to be given to the Holders may be given by certified mail or
   delivered to the Holders at their respective addresses as shown on the
   warrant register.

      C.  In case this Warrant shall be mutilated, lost, stolen, or destroyed,
   the Company shall issue a new warrant of like tenor and denomination and
   deliver the same (i) in exchange and substitution for and upon surrender and
   cancellation of any mutilated

                                      -7-
<PAGE>

   Warrant, or (ii) in lieu of any Warrant lost, stolen, or destroyed, upon
   receipt of evidence reasonably satisfactory to the Company of the loss,
   theft, or destruction of such Warrant (including a reasonably detailed
   affidavit with respect to the circumstances of any loss, theft, or
   destruction) and of indemnity reasonably satisfactory to the Company,
   provided, however, that, so long as the original holder remains the
   registered holder of this Warrant, no indemnity shall be required other than
   its written agreement to indemnify the Company against any loss arising from
   the issuance of such new warrant.

     17.  Registration Rights. The Amended and Restated Registration Rights
          -------------------
Agreement dated April 18, 1997 between the Company and the Holder and the other
parties thereto shall be amended to include the common stock issuable upon
exercise of this Warrant in the definition of Registrable Securities contained
in Section 1.2.

     18.  No Impairment. The Company will not, by amendment of its Articles of
          -------------
Incorporation or through any reclassification, capital reorganization,
consolidation, merger, sale or conveyance of assets, dissolution, liquidation,
issue or sale of securities, or any other voluntary action, avoid or seek to
avoid the observance or performance of any of the terms of this Warrant, but
will at all times in good faith assist in the carrying out of all such terms and
in the taking of all such action as may be necessary or appropriate in order to
protect the rights of the Holder.

     19.  Governing Law. The provisions and terms of this Warrant shall be
          -------------
governed by and construed in accordance with the internal laws of the State of
California.

     20.  Successors and Assigns. This Warrant shall be binding upon the
          ----------------------
Company's successors and assigns and shall inure to the benefit of the Holder's
successors, legal representatives, and permitted assigns.

     21.  Business Days. If the last or appointed day for the taking of any
          -------------
action required or the expiration of any right granted herein shall be a
Saturday or Sunday or a legal holiday in California, then such action may be
taken or right may be exercised on the next succeeding day which is not a
Saturday or Sunday or such a legal holiday.

Dated: May 1, 1998                           DESKTALK SYSTEMS, INC.

(Corporate Seal)                             By: /s/ David Kaufman
                                                ----------------------
                                                Name:  David Kaufman
ATTEST:                                         Title: President

By: /s/ Paul Madick
   ----------------------------
   Name:  Paul Madick
   Title: Corporate Secretary

                                      -8-
<PAGE>

                                 SUBSCRIPTION
                                 ------------

To: _______________________                       Date: __________________

     The undersigned hereby subscribes for _________ shares of Common Stock
covered by this Warrant. The certificate(s) for such shares shall be issued in
the name of the undersigned or as otherwise indicated below:

                                                ________________________
                                                Signature

                                                ________________________
                                                Name for Registration

                                                ________________________
                                                Mailing Address

                                      -9-
<PAGE>

                           NET ISSUE ELECTION NOTICE
                           -------------------------

To:_______________________                        Date: ______________________

     The undersigned hereby elects under Section 4 to surrender the right to
purchase shares of Common Stock pursuant to this Warrant. The certificate(s) for
the shares issuable upon such net issue election shall be issued in the name of
the undersigned or as otherwise indicated below.

                                                ___________________________
                                                Signature

                                                __________________________
                                                Name for Registration

                                                __________________________
                                                Mailing Address

                                      -10-

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00016-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00016-of-00352.parquet"}]]