Document:

<PAGE>

                                                                   EXHIBIT 10.20

                     THIRD AMENDMENT TO SUBLEASE AGREEMENT

     Reference is made to that certain Sublease Agreement, dated as of March 31,
1998 (the "Sublease") by and between the Sublandlord and Subtenant (as such
parties are identified below) for premises at the property commonly known as 201
Spring Street, Lexington, Massachusetts. This Third Amendment to Sublease
Agreement (this "Third Amendment") is entered into this 28th of February, 2001,
between Sublandlord and Subtenant. For valuable consideration, Sublandlord and
Subtenant agree that:

          1.   DEFINITIONS. In this Third Amendment the following terms have the
               meanings given to them.

               (a)  Sublandlord: MediaOne of Delaware, Inc., a Delaware
                    corporation.

               (b)  Subtenant: Segue Software, Inc., a Delaware corporation.

               (c)  Sublease: Sublease Agreement, dated March 31, 1998, between
                    Sublandlord and Subtenant; as amended by the First Amendment
                    to Sublease, dated effective July 15, 1998, and the Second
                    Amendment to Sublease, dated June 27, 2000.

               (d)  Building Address:         201 Spring Street
                                              Lexington, Massachusetts.

               (e)  Effective Date: July 1, 2000.

Any capitalized term used in this Third Amendment but not defined in this Third
Amendment has the meaning given for such term in the Lease.

     2. AMENDMENT TO SECTION 1. As of the Effective Date, the Rentable Area of
the Building was increased by the change of use of 3,800 square feet of storage
space (the "Storage Space") located in the basement of the Building from storage
space to office space. The Storage Space was NOT previously included in the
Rentable Area of the Building. Both the Master Lease and the Sublease require
that the Storage Space be included in the Rentable Area of the Building upon
such change of use. Therefore, as of the Effective Date, the subsections of
Section 1 set forth below are amended in their entirety to read as follows:

               (l)  RENTABLE AREA OF THE BUILDING: 106,300 square feet

               ****

               (n)  SUBTENANT'S SHARE:

                    8/1/98 - 12/31/98                   39.512%
                    1/1/99 - 6/30/99                    51.220%
                    7/1/99 - 6/30/00                    65.853%
                    7/1/00 - 10/31/07                   68.955%

                    (determined by dividing the Rentable Area of the Subleased
                    Premises by the Rentable Area of the Building and rounding
                    to the nearest one thousandth of one percent)

               ****

     3. CONFIRMATION OF THE RENTABLE AREA OF THE SUBLEASED PREMISES. Sublandlord
and Subtenant confirm that, as of the Effective Date, the Rentable Area of the
Subleased Premises is 73,300 square feet.

     4. CONFIRMATION OF SUBLEASE. Sublandlord and Subtenant confirm and ratify
in all respects, the terms and conditions of the Sublease, as amended by this
Third Amendment.

<PAGE>

     Sublandlord and Subtenant have executed this Third Amendment on the date
first set forth above.

SUBLANDLORD:                           SUBTENANT:

MEDIA ONE OF DELAWARE, INC.,           SEGUE SOFTWARE, INC., a Delaware
a Delaware corporation                 corporation

By                                     By /s/ Gary L. Stickel
  --------------------------------       --------------------------------------
Name                                   Name  Gary L. Stickel
    ------------------------------         ------------------------------------
Title                                  Title Vice President, Human Res. & Admin.
     -----------------------------          -----------------------------------

Approved as to legal form by counsel to Sublandlord:
Fisher, Sweetbaum & Levin, P.C.

By
Date

STATE OF Massachusetts)
                      )ss.
COUNTY OF Middlesex   )

     The foregoing was acknowledged before me this 28th day of February___,
2001, by Gary L. Stickel as VP, Human Resources & Administration of Segue
Software, Inc., a Delaware corporation.

     WITNESS my hand and official seal.

                                            /s/ Debra L. Cerqueira
                                            ------------------------------------
                                            Notary Public

     My commission expires Sept. 6, 2002

STATE OF              )
        --------------
                      )ss.
COUNTY OF             )
         -------------

     The foregoing was acknowledged before me this _________ day of February___,
2001, by________________________________as__________________________________
of MediaOne of Delaware, Inc., a Delaware corporation.

     WITNESS my hand and official seal.

                                            ------------------------------------
                                            Notary Public

     My commission expires
                          ------------------<PAGE>

                                  EXHIBIT 10AA

                                2000 AMENDMENT TO

                        1990 LIQUI-BOX STOCK OPTION PLAN

WHEREAS, Liqui-Box Corporation ("Corporation") adopted the 1990 Liqui-Box
Stock Option Plan ("1990 Stock Option Plan");

WHEREAS, as required by the terms of the 1990 Stock Option Plan, no options
have been issued after February 9, 2000, although options issued before that
date remain outstanding;

WHEREAS, effective December 1, 1999, the Corporation adopted the Liqui-Box
Corporation Executive Deferred Compensation Plan ("Deferred Compensation
Plan");

WHEREAS, participants in the Deferred Compensation Plan may elect to defer
any taxable income on the exercise of nonqualified stock options granted
under the 1990 Stock Option Plan by completing the appropriate section of the
"Deferral Notice" made available under the terms of the Deferred Compensation
Plan;

WHEREAS, subject to certain restrictions described in Section 14 of the 1990
Stock Option Plan, the Board retained the power to amend the 1990 Stock
Option Plan;

NOW, THEREFORE, effective on the date approved by the Corporation's Board of
Directors, Section 8 of the 1990 Stock Option Plan is amended by the addition
of the following new paragraph:

Each Participant who also is a participant in the Liqui-Box Corporation
Executive Deferred Compensation Plan ("Deferred Compensation Plan") may elect
to defer recognition of any gain on the exercise of any Non-Qualified Stock
Option by (i) completing the appropriate section of the Deferral Notice made
available under the Deferred Compensation Plan and (ii) otherwise complying
with the rules and requirements imposed by the Deferred Compensation Plan. If
this election is made, any Common Shares acquired through the exercise of a
Non-Qualified Stock Option subject to this deferral will be distributed from
the trust associated with the Deferred Compensation Plan under the
distribution provisions established as part of the Deferred Compensation
Plan, including the requirement that the affected Common Shares be held and
distributed in that form.

IN WITNESS WHEREOF, the undersigned officer of the Corporation has executed
this amendment to be effective as of September 26, 2000.

                                 LIQUI-BOX CORPORATION

                                 By:      /s/ C. William McBee
                                    -----------------------------------------

                                 Print Name:     C. William McBee
                                            ---------------------------------

                                 Title:   President & COO
                                       --------------------------------------

                                       14<PAGE>

                                   EXHIBIT 10D

                              LIQUI-BOX CORPORATION
                           LB SHARES STOCK OPTION PLAN

         Section 1. PURPOSE. This LB Shares Stock Option Plan (hereinafter
referred to as the "Plan") is intended as a means whereby full-time employees
(hereinafter referred to as "Employee" or "Employees" and "Optionee" or
"Optionees") of Liqui-Box Corporation (hereinafter referred to as the
"Company") or any subsidiary of the Company designated by the Executive
Committee of the Board of Directors of the Company (hereinafter individually
referred to a "Subsidiary" and collectively as the "Subsidiaries") can each
enlarge his or her proprietary interest in the Company, thereby encouraging
the judgment, initiative and efforts of the Employees for the successful
conduct of the Company's business. The Plan is also intended to create common
interests between the Employees and the other shareholders of the Company,
and to assist the Company in attracting, retaining and motivating Employees.

         Section 2. ADMINISTRATION OF THE PLAN. The Plan shall be
administered by the Executive Committee of the Board of Directors
(hereinafter referred to as the "Committee"). The Committee shall construe
and interpret the Plan, establish such operating guidelines and rules as it
deems necessary for the proper administration of the Plan and make such
determinations and take such other action in connection with the Plan as it
deems necessary and advisable. It shall designate the Subsidiaries whose
employees may participate in the Plan and determine the individuals to whom
and the time or times at which Options (as hereinafter defined) shall be
granted, the number of shares to be subject to each Option, the Option Price
(as hereinafter defined) and the duration of leaves of absence which may be
granted to participants without constituting a termination of their
employment for purposes of the Plan. Any such construction, interpretation,
rule determination or other action taken by the Committee pursuant to the
Plan shall be final, binding and conclusive on all interested parties,
including the Company and all former, present and future Employees of the
Company.

         Actions by a majority of the Committee at a meeting at which a
quorum is present, or actions approved in writing by all of the members of
the Committee, shall be the valid acts of the Committee. No member of the
Board of Directors or the Committee shall be liable for any action or
determination made in good faith with respect to the Plan or any Option
granted under it.

         Section 3. MAXIMUM NUMBER OF SHARES SUBJECT TO PLAN. Subject to any
adjustment as provided in the Plan, the shares to be offered under the Plan
may be, in whole or in part, authorized but unissued Common Shares of the
Company, or issued Common Shares which shall have been reacquired by the
Company and held by it as treasury shares. The aggregate number of Common
Shares to be delivered upon exercise of all Options granted under the Plan
shall not exceed 500,000 shares plus the amount of any additional Common
Shares which may result from any share distributions effected after the
approval of this Plan by the Board of Directors of the Company. If any Option
granted hereunder shall expire or terminate for any reason without having
been exercised in full, the unpurchased shares with respect thereto shall
again be available for other Options to be granted under the Plan unless the
Plan shall have been terminated.

         Section 4. SELECTION OF OPTIONEES. All those Employees of the
Company or its Subsidiaries as shall be determined from time to time by the
Committee shall be eligible to participate in the Plan, provided, however,
that no Employee may be granted Options in the aggregate which would result
in that Employee receiving more than ten percent of the maximum number of
shares available for issuance under the Plan. Any Employee who has been
granted an Option under another stock option plan of the Company may be
granted an additional Option or Options under the Plan if the Committee shall
so determine.

         Section 5. OPTION PRICE. The Option Price for the shares covered by
each option granted shall be the fair market value of the Common Shares on
the Grant Date (as hereinafter defined) of the Option. Such fair market value
shall be equal to the mean of the high and low prices of the Common Shares of
the Company as reported on the NASDAQ National Market System on such date.

                                       15

<PAGE>

         Section 6. OPTION REQUIREMENTS. The Options granted pursuant to the
Plan shall be authorized by the Committee and shall be evidenced in writing
in a form approved by the Committee and shall include the following terms and
conditions:

         (a)      OPTIONEE.  Each Option shall state the name off the
Optionee.

         (b)      NUMBER OF SHARES. Each Option shall state the number of
shares to which that Option pertains.

         (c)      OPTION PRICE. Each Option shall state the Option Price,
which shall be not less than one hundred percent (100%) of the fair market
value of the shares covered by such Option on the Grant Date of such Option.
See Section 5 hereof.

         (d) PAYMENT. The Option Price for the Options being exercised must
be paid in full at the time of exercise in a manner acceptable to the
Committee. In addition, in order to enable the Company to meet any applicable
foreign, federal (including FICA), state and local withholding tax
requirements, an Optionee shall also be required to pay the amount of tax to
be withheld at the time of exercise. No Common Shares will be delivered to
any Optionee until all such amounts have been paid.

         (e) LENGTH OF OPTION. Each Option shall be granted for a period to
be determined by the Committee but in no event to exceed more than ten (10)
years. However, subject to Sections 9 and 10, each Option shall be
exercisable only during such portion of its term as the Committee shall
determine, and only if the Optionee is employed by the Company or a
Subsidiary of the Company at the time of such exercise.

         (f) EXERCISE OF OPTION. With respect to Options offered pursuant to
the Plan to an Employee who is subject to Section 16 of the Securities
Exchange Act of 1934 ("Section 16 of the Exchange Act"), if any, no option
can be exercised for at least six (6) months after the Grant Date except in
the case of death or Disability (as hereinafter defined) as set forth in
Section 10 where the Option is otherwise exercisable. Otherwise, each
Optionee shall have the right to exercise his or her Option in the manner
specified in this Plan or in the agreement evidencing the granting of such
Option.

         Section 7. METHOD OF EXERCISE OF OPTIONS. Each Option shall be
exercised pursuant to the terms of such Option and pursuant to the terms of
this Plan by giving written notice to the Company at its principal place of
business or other address designated by the Company, accompanied by cash,
check, shares, or other property acceptable to the Committee, in payment of
the Option Price for the number of whole shares specified and paid for and
the amount of tax to be withheld as aforesaid. From time to time the
Committee may establish procedures relating to effecting such exercises. No
fractional shares shall be issued as a result of exercising an Option. The
Company shall make delivery of such shares as soon as possible; provided,
however, that if any law or regulation requires the Company to take action
with respect to the shares specified in such notice before issuance thereof,
the date of delivery of such shares shall then be extended for the period
necessary to take such action.

         Section 8. NON-TRANSFERABILITY OF OPTIONS. Except as set forth in
Section 10, an Option is exercisable during an Optionee's lifetime only by
the optionee. The Options shall not be transferable except by will or the
laws of descent and distribution, and shall terminate as provided in this
Plan.

         Section 9. EARLIER TERMINATION OF OPTIONS. Upon the termination of
the Optionee's employment for any reason whatsoever, including retirement,
the Options will terminate as to all shares covered by Options which have not
been exercised as of the date of such termination. Notwithstanding the
preceding sentence, however, Options shall be exercisable following the death
or Disability of the Optionee as set forth in Section 10.

         Section 10. EXERCISE UPON DEATH OR DISABILITY. In the event an
Optionee dies while employed by the Company or a Subsidiary, the estate of
the deceased Optionee shall have the right to exercise any rights the
Optionee would otherwise have under this Plan for a period of six (6) months
after the date of the Optionee's death, with exercise to be made as set forth
in Section 7.

                                       16

<PAGE>

         In the event an Optionee becomes Disabled while employed by the
Company or a Subsidiary, the Optionee (or, in the event the Optionee is
incapacitated and unable to exercise Options, the Optionee's legal guardian
or legal representative whom the committee deems appropriate based on
applicable facts and circumstances) shall have the right to exercise any
rights the Optionee would otherwise have under this Plan for a period of six
(6) months after the date the Optionee becomes Disabled, with exercise to be
made as sat forth in Section 7.

         Section 11. LIMITATION ON SALE OF COMMON SHARES OFFERED PURSUANT TO
PLAN. With respect to the Common Shares offered pursuant to the Plan to an
Employee who is subject to Section 16 of the Exchange Act, if any, such
Common Shares cannot be sold for a least six (6) months after acquisition,
except in the case of death or Disability.

         Section 12. NON-QUALIFIED STOCK OPTIONS. The Options granted under
the Plan shall be non-qualified stock options.

         Section 13. EFFECT OF CHANGE IN COMMON SHARES SUBJECT TO THE PLAN.
In the event any dividend upon the Common Shares payable in shares is
declared by the Company, or in case of any subdivision or combination of the
outstanding Common Shares the aggregate number of Common Shares to be
delivered upon exercise of all Options granted under the Plan shall be
increased or decreased proportionately so that there will be no change in the
aggregate purchase price payable upon the exercise of the Option. In the
event of any other recapitalization or any reorganization, merger,
consolidation or any change in the corporate structure or stock of the
Company, the Committee shall make such adjustment, if any, as it may deem
appropriate to reflect accurately the terms of the option as to the number
and kind of shares deliverable upon subsequent exercising of the Option and
in the Option prices under the Option.

         Section 14. LISTING AND REGISTRATION OF COMMON SHARES. If at any
time the Committee shall determine that listing, registration or
qualification of the Common Shares covered by the Option upon any securities
exchange or under any state or federal law or the consent or the approval of
any governmental regulatory body is necessary or desirable as a condition of
or in connection with the purchase of Common Shares under the Option, the
Option may not be exercised in whole or in part unless and until such
listing, registration, qualification, consent or approval shall have been of
effected or obtained free of any conditions not acceptable to the Committee.
Any person exercising an Option shall make such representations and
agreements and furnish such information as the Committee may request to
assure compliance with the foregoing or any other applicable legal
requirements.

         Section 15. NO OBLIGATION TO EXERCISE OPTION. The granting of an
Option shall impose no obligation upon the Optionee to exercise such Option.

         Section 16. MISCONDUCT. In the event that an Optionee has (i) used
for profit or disclosed to unauthorized persons, confidential information or
trade secrets of the Company or its Subsidiaries, or (ii) breached any
contract with or violated any fiduciary obligation to the Company or its
Subsidiaries, or (iii) engaged in unlawful trading in the securities of the
Company or its Subsidiaries or of another company based on information gained
as a result of the Optionee's employment with the Company or its
Subsidiaries, then that Optionee shall forfeit all rights to any Unexercised
Options granted under the Plan and all of the Optionee's outstanding Options
shall automatically terminate and lapse, unless the Committee shall determine
otherwise.

         Section 17. FOREIGN EMPLOYEES. Without amending the Plan, the
Committee may grant Options to eligible Employees who are foreign nationals
on such terms and conditions different from those specified in this Plan as
may in the judgment of the Committee be necessary or desirable to foster and
promote achievement of the purposes of the Plan, and, in furtherance of such
purposes, the committee nay make such modifications, amendments, procedures,
and the like as may be necessary or advisable to comply with provisions of
laws of other countries in which the company or its Subsidiaries operate or
have employees.

         Section 18. BUY OUT OF OPTION GAINS. At any time after any Option
becomes exercisable, the Committee shall have the right to elect, in its sole
discretion and without the consent of the

                                       17

<PAGE>

holder thereof, to cancel such Option and pay to the Optionee the excess of
the fair market value of the Common Shares covered by such Option over the
Option Price of such Option at the date the Committee provides written notice
(the "Buy Out Notice") of the intention to exercise such right. Buy outs
pursuant to this provision shall be effected by the Company as promptly as
possible after the date of the Buy Out Notice. Payments of buy out amounts
may be made in cash, in Common Shares, or partly in cash and partly in Common
Shares, as the Committee deems advisable. To the extent payment is made in
Common Shares, the number of shares shall be determined by dividing the
amount of the payment to be made by the fair market value of a Common Share
at the date of the Buy Out Notice. In no event shall the Company be required
to deliver a fractional Common Share in satisfaction of this buy out
provision. Payments of any such buy out amounts shall be made net of any
applicable foreign, federal (including FICA), state and local withholding
taxes. For the purposes of this Section 18, fair market value shall be equal
to the mean of the high and low prices of the Common Shares of the Company as
reported on the NASDAQ National Market System on the relevant date.

         Section 19. NO RIGHTS TO OPTIONS OR EMPLOYMENT. No Employee or other
person shall have any claim or right to be granted an Option under the Plan.
Having received an Option under the Plan shall not give an Employee any right
to receive any other grant under the Plan. An Optionee shall have no rights
to or interest in any Option except as set forth herein. Neither the Plan nor
any action taken herein shall be construed as giving any Employee any right
to be retained in the employ of the Company or its Subsidiaries.

         Section 20. MERGER, CONSOLIDATION, ETC. In the event that the
Company is a party to a plan or agreement for merger or consolidation or
reclassification of its securities or the exchange of its securities for the
securities of another person which has acquired the Company's assets or which
is in control (as defined in Section 368(c) of the Internal Revenue Code of
1986, as amended) of a person which has acquired the Company's assets, where
the terms of such plan or agreement are binding upon all shareholders of the
Company, except to the extent that dissenting shareholders may be entitled to
relief under Section 1701.85 of the Ohio Revised Code, then Options granted
and outstanding pursuant to the Plan for more than six (6) months,
notwithstanding the date of exercise fixed in the grant of such Options,
shall become immediately exercisable and each Optionee shall be entitled to
receive, upon payment of the amount required for exercise of each Option,
securities or cash consideration, or both, equal to those the Optionee would
have entitled to receive under such plan or agreement if the Optionee had
already exercised such option.

         Section 21. AMENDMENT OR TERMINATION. The Board of Directors may
amend or terminate the Plan at any time, provided that the Board of Directors
shall not (except as provided in Sections 9, 10 and 13 hereof ) make any
change in the Options which will impair the rights of the Optionee Therein,
without the consent or the Optionee. No option shall be granted herein after
September 1, 2001.

         Section 22. OTHER ACTIONS. This Plan shall not restrict the
authority of the Committee, the Board of Directors or of the Company or its
Subsidiaries for proper corporate purposes to grant or assume stock options,
other than under the Plan, to or with respect to any Employee or other person.

         Section 23. COSTS AND EXPENSES. Except as provided in Section 6(d)
hereof with respect to taxes, the costs and expenses of administering the
Plan shall be borne by the Company, and shall not be charged to any grant nor
to any Employee receiving a grant.

         Section 24. PLAN UNFUNDED. The Plan shall be unfunded. Except for
reserving a Sufficient number of authorized shares to the extent required by
law to meet the requirements of the Plan, the Company shall not be required
to establish any special or separate fund or to make any other segregation of
assets to assure payment of any grant under the Plan.

         Section 25. LAWS GOVERNING PLAN. This Plan shall be construed under
and governed by the laws off the State of Ohio.

         Section 26. CAPTIONS. The captions to the several sections hereof
are not a part of this Plan, but are merely guides or labels to assist in
locating and reading the several sections hereof.

                                       18

<PAGE>

         Section 27. EFFECTIVE DATE. The Plan shall become effective on the
date it is approved by the Board of Directors of the Company.

         Section 28. DEFINITIONS. Unless the context clearly indicates
otherwise, the following terms, when used in this Plan, shall have the
meaning set forth below:

(a) The "Grant Date" of an option shall be the date on which an Option is
granted under the Plan.

(b) "Option" means the right granted under the Plan to an Optionee to
purchase a Common Share of the Company at a fixed price for a specified
period of time.

(c) "Option Price" means the price at which a Common Share covered by an
option granted hereunder may be purchased. See Section 5 and Section 6(o)
hereof.

(d) With regard to any particular Employee, "Disabled" shall have the meaning
set forth in the Company's long term disability program applicable to such
Employee.

                                       19

<PAGE>

                                2000 AMENDMENT TO
                           LB SHARES STOCK OPTION PLAN

WHEREAS, Liqui-Box Corporation ("Corporation") adopted the Liqui-Box
Corporation LB Shares Stock Option Plan ("LB Share Stock Option Plan");

WHEREAS, as required by the terms of the LB Shares Stock Option Plan, no
options may be issued after September 1, 2001, although options issued before
that date may remain outstanding after that date;

WHEREAS, effective December 1, 1999, the Corporation adopted the Liqui-Box
Corporation Executive Deferred Compensation Plan ("Deferred Compensation
Plan");

WHEREAS, participants in the Deferred Compensation Plan may elect to defer
any taxable income on the exercise of Options granted under the LB Shares
Stock Option Plan by completing the appropriate section of the "Deferral
Notice" made available under the terms of the Deferred Compensation Plan;

WHEREAS, subject to certain restrictions described in Section 21 of the LB
Shares Stock Option Plan, the Board retained the power to amend the LB Shares
Stock Option Plan;

NOW, THEREFORE, effective on the date approved by the Corporation's Board of
Directors, Section 7 of the LB Shares Stock Option Plan is amended by the
addition of the following new paragraph:

Each Participant who also is a participant in the Liqui-Box Corporation
Executive Deferred Compensation Plan ("Deferred Compensation Plan") may elect
to defer recognition of any gain on the exercise of any Option by (i)
completing the appropriate section of the Deferral Notice made available
under the Deferred Compensation Plan and (ii) otherwise complying with the
rules and requirements imposed by the Deferred Compensation Plan. If this
election is made, any Common Shares acquired through the exercise of an
Option subject to this deferral will be distributed from the trust associated
with the Deferred Compensation Plan under the distribution provisions
established as part of the Deferred Compensation Plan, including the
requirement that the affected Common Shares be held and distributed in that
form.

IN WITNESS WHEREOF, the undersigned officer of the Corporation has executed
this amendment to be effective as of September 26, 2000.

                                      LIQUI-BOX CORPORATION

                                      By:      /s/ C. William McBee
                                         -------------------------------------

                                      Print Name:     C. William McBee
                                                 -----------------------------

                                      Title:   President & COO
                                            ----------------------------------

                                       20

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00022-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00022-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00022-of-00352.parquet"}]]