Document:

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                                                                    Exhibit 10.2

THESE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED. SUCH SECURITIES MAY NOT BE TRANSFERRED,
UNLESS A REGISTRATION STATEMENT UNDER THE ACT IS IN EFFECT AS TO SUCH TRANSFER
OR, IN THE OPINION OF COUNSEL TO THE ISSUER, AN EXEMPTION FROM REGISTRATION IS
THEN AVAILABLE.

                                     WARRANT

             VOID AFTER 5:00 P.M., California Time, on March 8, 2006

                        WARRANT TO PURCHASE COMMON STOCK
                                       OF
                                INTELLICORP, INC.

        This is to certify that subject to the terms and conditions hereof, FOR
VALUE RECEIVED, ___________ (the "Initial Holder") or registered assigns
(collectively referred to as the "Holder") is entitled to purchase, at an
exercise price per share of $2.00 (the "Exercise Price"), _________ shares (the
"Warrant Shares") of the Common Stock (the "Common Stock") of IntelliCorp, Inc.,
a Delaware corporation (the "Company"), at any time during the period from March
8, 2001 (the "Commencement Date") to 5:00 P.M., California Time, on March 8,
2006, at which time this Warrant will expire and become void. The following
terms shall apply to this Warrant:

        1. Exercise of Warrant, Reservation of Shares.

               1.1. Subject to the terms and conditions hereof, this Warrant may
be exercised in whole or in part at any time and from time to time on or after
the Commencement Date, and before 5:00 P.M., California Time, on March 8, 2006,
or if such day is a day on which federal or state chartered bank institutions
located in the State of California are authorized by law to close, then on the
next succeeding day which shall not be such a day, by presentation and surrender
hereof to the Company at its principal office or at the office of its warrant
transfer agent, if any, with the attached Purchase Form duly executed and
accompanied by payment, in cash or certified or official bank check payable to
the order of the Company, of the Exercise Price for the number of Warrant Shares
specified in such form. If this Warrant should be exercised in part only, the
Company will, upon presentation of this Warrant upon such exercise, execute and
deliver a new warrant, dated the date hereof, evidencing the rights of the
Holder thereof to purchase the balance of the Warrant Shares purchasable
hereunder upon the same terms and conditions as herein set forth. Upon and as of
such receipt of this Warrant and the Purchase Form by the Company at its office,
in proper form for exercise and accompanied by payment as herein provided, the
Holder shall be deemed to be the holder
<PAGE>   2

of record of the Warrant Shares issuable upon such exercise, notwithstanding
that the stock transfer books of the Company shall then be closed or that
certificates representing the Warrant Shares shall not then be actually
delivered to the Holder. The Company shall promptly take such reasonable steps
as it deems necessary in order to issue the Warrant Shares to be delivered
following exercise of this Warrant, but in any event within three business days
from the date the Warrant is exercised.

               1.2. Net Issue Exercise of Warrant. Notwithstanding any
provisions herein to the contrary, if the fair market value of one share of
Common Stock is greater than the Exercise Price (at the date of calculation as
set forth below), in lieu of exercising this Warrant for cash, Holder may elect
to receive shares of Common Stock equal to the value (as determined below) of
this Warrant (or the portion thereof being canceled) by surrender of this
Warrant at the principal office of the Company together with the properly
endorsed Purchase Form in which event the Company shall issue to the Holder a
number of shares of Common Stock computed using the following formula:

                      X   =  Y(A-B)
                             ------
                               A
        Where         X   =  the number of shares of Common Stock to be issued
                             to Holder
                      Y   =  the number of shares of Common Stock purchasable
                             under the Warrant or, if only a portion of the
                             Warrant is being exercised, the portion of the
                             Warrant being canceled (at the date of such
                             calculation)
                      A   =  the fair market value of one share of the
                             Company's Common Stock (at the date of such
                             calculation)
                      B   =  Exercise Price (as adjusted to the date of such
                             calculation)

For purposes of the above calculation, the fair market value of one share of
Common Stock shall be the closing bid price of the Common Stock on the principal
United States securities exchange or trading market on which the Common Stock is
listed or traded as reported by Bloomberg Financial Markets, or a comparable
financial reporting service of national reputation selected by the Corporation
for the five (5) trading days prior to the date of determination of fair market
value.

               1.3. The Company covenants that at all times after the
Commencement Date and until expiration of this Warrant, it shall reserve for
issuance and delivery upon exercise of this Warrant the number of Warrant Shares
as shall be required for issuance and delivery upon exercise of this Warrant.
The Company further covenants that its issuance of this Warrant shall constitute
full authority to its officers who are charged with the duty of executing stock
certificates to execute and issue the necessary certificates for shares of the
Company's Common Stock upon the exercise of the purchase rights under this
Warrant. The Company further covenants and agrees (i) that it will not, by

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amendment of its Certificate of Incorporation or through reorganization,
consolidation, merger, dissolution or sale of assets, or by any other voluntary
act, avoid or seek to avoid the observation or performance of any of the
covenants, stipulations or conditions to be observed or performed hereunder by
the Company, (ii) promptly to take such action as may be required of the Company
to permit the Holder to exercise this Warrant and the Company duly and
effectively to issue shares of its Common Stock or other securities as provided
herein upon the exercise hereof and (iii) promptly to take all action required
or provided in Section 4 hereof.

        2. Fractional Shares. No fractional shares or scrip representing
fractional shares shall be issued upon the exercise of this Warrant. With
respect to any fractional shares called for upon exercise hereof, the Company
will pay to the Holder an amount in cash equal to such fraction multiplied by
the fair market value of a share of Common Stock, as determined by the Board of
Directors.

        3. Transfer in Compliance with the Securities Act of 1933; Exchange,
Assignment or Loss of Warrant.

               3.1. This Warrant may not be sold, assigned or transferred,
except as provided herein, and in accordance with and subject to the provisions
of the Securities Act of 1933, as amended, and the Rules and Regulations
promulgated thereunder (said Act and such Rules and Regulations being
hereinafter collectively referred to as the "Act"). Any purported transfer or
assignment made other than in accordance with this Section 3 shall be null and
void and of no force and effect.

               3.2. Each certificate for Warrant Shares or for any other
security issued or issuable upon exercise of this Warrant shall contain a legend
as follows, unless, in the opinion of counsel reasonably satisfactory to the
Company, such legend is not required:

        THESE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED. SUCH SECURITIES MAY NOT BE TRANSFERRED,
UNLESS A REGISTRATION STATEMENT UNDER THE ACT IS IN EFFECT AS TO SUCH TRANSFER
OR, IN THE OPINION OF COUNSEL TO THE ISSUER, AN EXEMPTION FROM REGISTRATION IS
THEN AVAILABLE.

               3.3. Subject to the provisions of Sections 3.1 through 3.2, this
Warrant is exchangeable, without expense, at the option of the Holder, for other
warrants of different denominations entitling the Holder to purchase in the
aggregate the same number of Warrant Shares purchasable on the same terms and
conditions, upon presentation at the principal office of the Company or at the
office of its warrant transfer agent, if any, together with a written notice
signed by the Holder specifying the names and denominations in which new
warrants are to be issued, and may be divided or combined with other warrants
which carry the same rights, upon presentation at the principal office

                                      -3-
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of the Company or at the office of its warrant transfer agent, if any, together
with a written notice signed by the Holder specifying the names and
denominations in which new warrants are to be issued.

               3.4. Any assignment permitted under this Warrant will be made by
surrender of this Warrant to the Company at its principal office or at the
office of its warrant transfer agent, if any, with the attached Assignment Form
duly executed and accompanied by funds sufficient to pay any transfer tax. In
such event the Company will, without charge, execute and deliver a new Warrant
in the name of the assignee named in such instrument of assignment, and this
Warrant will promptly be canceled.

               3.5. Upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of this
Warrant, and (in the case of loss, theft or destruction) of reasonably
satisfactory indemnification, and upon surrender and cancellation of this
Warrant, if mutilated, the Company will execute and deliver a new Warrant of
like tenor and date and any such lost, stolen, or destroyed Warrant shall
thereupon become void.

        4. Adjustment of Number of Warrant Shares and Exercise Price.

               4.1. The number of Warrant Shares for which this Warrant may be
exercised shall be subject to adjustment as follows:

                      (a) In the event there is a subdivision or combination of
the outstanding shares of Common Stock into a larger or smaller number of
shares, the number of Warrant Shares shall be increased or reduced in the same
proportion as the increase or decrease in the outstanding shares of Common
Stock.

                      (b) If the Company declares a dividend on Common Stock
payable in Common Stock or securities convertible into Common Stock, the number
of Warrant Shares shall be increased, as of the record date for determining
which holders of Common Stock shall be entitled to receive such dividend, in
proportion to the increase in the number of outstanding shares of Common Stock
as a result of such dividend.

               4.2. Change of Control Event.

                      (a) In case of any consolidation of the Company with, or
merger of the Company into, any other corporation (other than a consolidation or
merger in which the Company is the continuing corporation and in which no change
occurs in its outstanding Common Stock), or in case of any sale or transfer of
all or substantially all of the assets of the Company, or in the case of any
statutory exchange of securities with another corporation (including any
exchange effected in connection with a merger of a third corporation into the
Company, except where the Company is the surviving entity and no change occurs
in its outstanding Common Stock), the corporation formed by such

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consolidation or the corporation resulting from or surviving such merger or the
corporation which shall have acquired such assets or securities of the Company,
as the case may be, shall execute and deliver to the Holder simultaneously
therewith a new Warrant, satisfactory in form and substance to the Holder,
together with such other documents as the Holder may reasonably request,
entitling the Holder thereof to receive upon exercise of such Warrant the kind
and amount of shares of stock and other securities and property receivable upon
such consolidation, merger, sale, transfer, or exchange of securities, or upon
the dissolution following such sale or other transfer, by a holder of the number
of shares of Common Stock purchasable upon exercise of this Warrant immediately
prior to such consolidation, merger, sale, transfer, or exchange. Such new
Warrant shall contain the same basic other terms and conditions as this Warrant
and shall provide for adjustments which, for events subsequent to the effective
date of such written instrument, shall be as nearly equivalent as may be
practicable to the adjustments provided for in this Section 4. The above
provisions of this Section 4(a) shall similarly apply to successive
consolidations, mergers, exchanges, sales or other transfers covered hereby.

                      (b) If the Company at any time shall, by subdivision,
combination or reclassification of securities or otherwise, change any of the
securities to which purchase rights under this Warrant exist into the same or a
different number of securities of any class or classes, this Warrant shall
thereafter represent the right to acquire such number and kind of securities as
would have been issuable as the result of such change with respect to the
securities which were subject to the purchase rights under this Warrant
immediately prior to such subdivision, combination, reclassification or other
change. If shares of the Company's Common Stock are subdivided or combined into
a greater or smaller number of shares of Common Stock, the purchase price under
this Warrant shall be proportionately reduced in the case of a subdivision of
shares or proportionately increased in the case of a combination of shares, in
both cases by the ratio which the total number of shares of Common Stock to be
outstanding immediately after such event bears to the total number of shares of
Common Stock outstanding immediately prior to such event.

     4.3. If the Company shall, at any time prior to the expiration of this
Warrant, dissolve, liquidate or wind up its affairs, the Holder shall have the
right, but not the obligation, to exercise this Warrant. Upon such exercise the
Holder shall have the right to receive, in lieu of the shares of Common Stock
that the Holder otherwise would have been entitled to receive, the same kind and
amount of assets as would have been issued, distributed or paid to the Holder
upon any such dissolution, liquidation or winding up with respect to such shares
of Common Stock had the Holder been the holder of record of such shares of
Common Stock receivable upon exercise of this Warrant on the date for
determining those entitled to receive any such distribution. If any such
dissolution, liquidation or winding up results in any cash distribution in
excess of the Exercise Price

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provided for by this Warrant, the Holder may, at the Holder's option, exercise
this Warrant without making payment of the Exercise Price and, in such case, the
Company shall, upon distribution to the Holder, consider the Exercise Price to
have been paid in full, and in making settlement to the Holder shall deduct an
amount equal to the Exercise Price from the amount payable to the Holder.

               4.4. Whenever the number of shares of Common Stock purchasable
upon the exercise of this Warrant is adjusted as herein provided, the Exercise
Price shall be adjusted by multiplying the applicable Exercise Price immediately
prior to such adjustment by a fraction, the numerator of which shall be the
number of shares of Common Stock purchasable upon exercise of this Warrant
immediately prior to such adjustment and the denominator of which shall be the
number of shares of Common Stock purchasable immediately after such adjustment.

               4.5. Upon any adjustment of the Exercise Price, then and in each
such case the Company shall give written notice thereof, by first class mail,
postage prepaid, addressed to the Holder at the address of such Holder as shown
on the books of the Company, which notice shall state the Exercise Price
resulting from such adjustment, setting forth in reasonable detail the method of
calculation and the facts upon which such calculation is based.

               4.6. The issuance of certificates for shares of Common Stock upon
exercise of this Warrant shall be made without charge to the Holder thereof for
any issuance tax in respect thereof; provided, that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the issuance and delivery of any certificate in a name other than that of the
Holder.

        5. Rights of Holder. Except as otherwise provided in Section 1.1 above,
this Warrant does not entitle the Holder to any rights of a shareholder of the
Company either at law or in equity, and the rights of any such Holder are
limited to those expressed in this Warrant and are not enforceable against the
Company, except to the extent set forth herein.

        6. Warrant Transfer Agent. Any reference in this Warrant to the warrant
transfer agent will apply if, and only if, the Company will have advised the
Holder that such an agent has been designated as an agency for the transfer or
exercise of this Warrant.

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        7. Expense of Enforcement. If any action, proceeding or litigation is
commenced to enforce any provision of this Warrant, then the prevailing party
shall be entitled to be reimbursed by the unsuccessful party for all costs
incurred in connection with such action, proceeding or litigation, including a
reasonable allowance for attorneys' fees and costs, which amount shall be added
to and become part of the final decision in such matter.

        8. Governing Law. This Warrant shall be construed in accordance with the
laws of the State of California.

        9. Registration Rights. The Company is required to register the Warrant
Shares as provided in that certain Series C Preferred Stock Purchase Agreement
(the "Purchase Agreement") between the Company and the parties thereto, and
Sections 4 and 6 of the Purchase Agreement are incorporated by reference into
this Warrant.

        10. Notices. Any notice required hereunder shall be by writing and shall
be given by personal delivery, or United States mail, certified or registered
with return receipt requested, postage prepaid and shall be deemed to be
effective five (5) business days after mailing or on the date of delivery if
delivered personally, at the following addresses, or such other addresses as one
party may from time to time give the other in writing:

               To the Company:      INTELLICORP, INC.
                                    1975 El Camino Real
                                    Mountain View, CA 94040
                                    Attention: CFO

               To Holder:           At the address set forth below.

        IN WITNESS WHEREOF, the Company has executed this Warrant as of the 8th
day of March, 2001.

                                            INTELLICORP, INC.

                                            By:
                                                ---------------------------

        Initial Holder:

        Name:

        Address:

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<PAGE>   8

                                  PURCHASE FORM

                                                       Dated:  ________________

        The undersigned hereby irrevocably elects to exercise the within Warrant
to the extent of purchasing __________ shares of Common Stock and hereby makes
payment of $__________ in payment of the actual Exercise Price thereof.

        __ [Please check if this option is selected] Instead of paying cash for
exercise of the Warrant as provided above, the undersigned, the holder of the
attached Warrant, hereby irrevocably elects to exercise the purchase right
represented by such Warrant for, and to purchase thereunder, shares of Common
Stock of the Company and herewith elects to pay for such shares by reducing the
number of shares issuable thereunder in accordance with Section 1.2 thereof. The
undersigned hereby authorizes the Company to make the required calculation under
Section 1.2 of the Warrant.

                     INSTRUCTIONS FOR REGISTRATION OF STOCK

Name:
               ------------------------------------------------------
                  (Please typewrite or print in block letters)

Address:
               ------------------------------------------------------

               ------------------------------------------------------

               ------------------------------------------------------

                                            Signature:
                                                      ----------------------

<PAGE>   9

                                 ASSIGNMENT FORM

        FOR VALUE RECEIVED, ____________________ hereby sells, assigns and
transfers unto

Name:
          ------------------------------------------------------
               (Please typewrite or print in block letters)

Address:________________________________________________________________
the right to purchase Common Stock represented by this Warrant to the extent of
_________ shares of Stock and does hereby irrevocably constitute and appoint
____________________, attorney, to transfer the same on the books of the Company
with full power of substitution in the premises.

                                             Signature:
                                                       -------------------------

Dated:
       -----------------------<PAGE>   1
                                                                    EXHIBIT 10.3

                               [INTELLICORP LOGO]

                                INTELLICORP, INC.
                         COMMON STOCK PURCHASE AGREEMENT

      THIS COMMON STOCK PURCHASE AGREEMENT (the "AGREEMENT") is made and entered
into as of September 29, 2000, by and between IntelliCorp, Inc., a Delaware
corporation (the "COMPANY"), and investors listed on the attached Exhibit A who
become signatories to this Agreement (the "PURCHASERS").

      THE PARTIES AGREE AS FOLLOWS:

      1. ISSUANCE OF SHARES; PURCHASE PRICE. The Purchasers hereby purchase and
the Company hereby sells an aggregate of 1,000,000 shares of the Company common
stock (the "SHARES") at a purchase price of $1.00 per share payable in cash. In
addition, in consideration for the investment by the Purchasers, the Company
shall issue each Purchaser a five-year Warrant to purchase 25% of that number of
Shares that are being purchased by such Purchaser under this Agreement at an
exercise price of $2.00 per share. The number of Shares and Warrants to be
purchased by each Purchaser is set forth opposite the name of each Purchaser on
Exhibit A. The shares of common stock issuable upon exercise of the Warrant are
referred to herein as the "WARRANT SHARES".

      2. RIGHT OF PARTICIPATION. In the event the Company shall propose to sell
and issue additional shares of the Company's common stock in a private equity
financing with gross profits to the Company of at least $5,000,000 closing on or
prior to June 30, 2001 (the "FINANCING"), each Purchaser shall have the right to
participate in the first Financing by purchasing such aggregate number of shares
with a purchase value equal to the purchase price of the Shares purchased by
the Purchaser under this Agreement.

      3. REGISTRATION RIGHT. The Shares shall be subject to registration rights
which will require the Company to file with the SEC a registration Statement on
Form S-3 (or equivalent) covering the resale of the Shares and the Warrant
Shares.

      4. PURCHASER'S REPRESENTATIONS. Each Purchaser is acquiring the Shares and
the Warrant Shares for the Purchaser's own account, and not directly or
indirectly for the account of any other person. The Purchaser is acquiring the
Shares and the Warrant Shares for investment and not with a view to distribution
or resale thereof except in compliance with the Act and any applicable state law
regulating securities, and the certificates for any Shares will bear restrictive
legends to that effect.

<PAGE>   2
      5. GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the laws of the State of California applicable to contracts
entered into and to be performed entirely within the State of California by
residents of the State of California.

      6. ENTIRE AGREEMENT. This Agreement constitutes the entire agreement of
the parties pertaining to the Shares and supersedes all prior and
contemporaneous agreements, representations, and understandings of the parties.

      IN WITNESS WHEREOF, the parties hereto have executed the Common Stock
Purchase Agreement as of the date first above written.

                                       INTELLICORP, INC.
                                       A Delaware corporation

                                       By:
                                           ------------------------------------
                                           Jerome F. Klajbor

                                       Title: Chief Financial Officer
                                              ----------------------------------

                                       By:
                                           ------------------------------------
                                           Wechsler & Co. Inc.

                                       Address: 105 South Bedford Rd., Suite 310
                                                --------------------------------
                                                Mount Kisco, NY 10549
                                                --------------------------------

                                       By:
                                           ------------------------------------
                                           Victor Morgenstern

                                       Address:
                                                --------------------------------

                                                --------------------------------

                                                --------------------------------

                                       By:
                                           ------------------------------------
                                           Art Berry

                                       2
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                                       Address:
                                                --------------------------------

                                                --------------------------------

                                                --------------------------------

                                       By:
                                           ------------------------------------
                                           Alan K. Greene

                                       Address:
                                                --------------------------------

                                                --------------------------------

                                                --------------------------------

                                       By:
                                           ------------------------------------
                                           Gregory Sulier

                                       Address:
                                                --------------------------------

                                                --------------------------------

                                                --------------------------------

                                       3
<PAGE>   4
                                    EXHIBIT A

<TABLE>
<CAPTION>
NAME OF INVESTOR               SHARES               WARRANTS
----------------              --------              --------
<S>                           <C>                    <C>             <C>
Wechsler & Co. Inc.           650,000                162,500         $650K
Victor Morgenstern            200,000                 50,000         $200K
Art Berry                     100,000                 25,000         $100K
Alan Greene                    25,000                  6,250         $ 25K
Gregory Sulier                 25,000                  6,250         $ 25K
</TABLE>

                                       4

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