EXHIBIT 10.34

                               FOURTH AMENDMENT

        THIS FOURTH AMENDMENT (this "Amendment") is made and entered into as of
the 17 day of July, 2000 by and between EOP-Bay Park Plaza, L.L.C, a Delaware
    --       -----
limited liability company ("Landlord"), and CROSSWORLDS SOFTWARE, INC., a
Delaware corporation ("Tenant").

                                  WITNESSETH:


A.       WHEREAS, Landlord and Tenant (as successor in interest to Crossroads
         Software, Inc.) are parties to that certain lease dated the 6th day of
         December, 1996 (the "Original Lease") for space currently containing
         approximately 44,492 rentable square feet (the "Original Premises")
         described as Suite Nos. 800, 500, 600, 210 and 230 on the 8th, 5th, 6th
         and 2nd floors of the building commonly known as Bay Park Plaza and the
         address of which is 577 Airport Boulevard, Burlingame, California 94010
         (the "Building"), which lease has been previously amended or assigned
         by instruments dated March 16, 1998, March 20, 1999, April 13, 1999 and
         January 28, 2000 (collectively, the "Lease"); and

B.       WHEREAS, Tenant has requested that additional space containing
         approximately 6,782 rentable square feet described as Suite No. 650 on
         the 6th floor of the Building shown on Exhibit A hereto (the "Sixth
         Expansion Space") be added to the Original Premises and that the Lease
         be appropriately amended and Landlord is willing to do the same on the
         terms and conditions hereinafter set forth:

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
herein contained and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Landlord and Tenant agree as
follows:

I.       Sixth Expansion and Effective Date. Effective as of the Sixth Expansion
         ----------------------------------
         Effective Date (as hereinafter defined), the Premises, as defined in
         the Lease, is increased from 44,492 rentable square feet on the 8th,
         5th, 6th and 2nd floors to 51,274 rentable square feet on the 8th, 5th,
         6th and 2nd floors by the addition of the Sixth Expansion Space, and
         from and after the Sixth Expansion Effective Date, the Original
         Premises and the Sixth Expansion Space, collectively, shall be deemed
         the Premises, as defined in the Lease. The Term for the Sixth Expansion
         Space shall commence on the Sixth Expansion Effective Date and end on
         the Expiration Date (as such term is defined in the Basic Lease
         Information attached to the Original Lease). The Sixth Expansion Space
         is subject to all the terms and conditions of the Lease except as
         expressly modified herein and except that Tenant shall not be entitled
         to receive any allowances, abatements or other financial concessions
         granted with respect to the Original Premises unless such concessions
         are expressly provided for herein with respect to the Sixth Expansion
         Space.

         A.       Subject to Section VI of this Amendment, the Sixth Expansion
                  Effective Date shall be the earlier to occur of (i) the date
                  which is 14 days after delivery of possession of the Sixth
                  Expansion Space to Tenant, and (ii) the date upon which Tenant
                  first commences to conduct business in the Sixth Expansion
                  Space. As used herein, "delivery of possession" of the Sixth
                  Expansion Space shall be deemed to have occurred on the day
                  immediately following the later to occur of (i) the
                  termination of the existing lease of such Sixth Expansion
                  Space, and (ii) the vacation of such Sixth Expansion Space by
                  the prior occupant thereof. The Sixth Expansion Effective Date
                  is anticipated to occur on July 15, 2000 (the "Target Sixth
                  Expansion Effective Date").

         B.       The Sixth Expansion Effective Date shall be delayed beyond the
                  Target Sixth Expansion Effective Date to the extent that
                  Landlord fails to deliver possession of the Sixth Expansion
                  Space for any reason (other than delays by Tenant), including
                  but not limited to, failure by Landlord to terminate prior
                  existing leases or holding over by prior occupants. The
                  occurrence of the Sixth Expansion Effective Date and the
                  expansion of the Premises by the Sixth Expansion Space shall
                  be conditioned upon the termination of any and all prior
                  existing leases affecting the Sixth Expansion Space. Any delay
                  in the Sixth Expansion Effective Date or any failure of the
                  Sixth Expansion Effective Date to occur shall not subject
                  Landlord to any liability for any loss or damage resulting
                  therefrom. If the


             Sixth Expansion Effective Date is delayed, the Expiration Date
             under the Lease shall not be similarly extended.

II.     Monthly Base Rent.
        -----------------

        In addition to Tenant's obligation to pay Base Rent for the Original
        Premises, Tenant shall pay Landlord. Base Rent for the Sixth Expansion
        Space in accordance with the schedule as set forth below.




              Period             Annual Rate       Annual Base Rent         Monthly Base
                               Per Square Foot                                  Rent

                                                                 
         7/15/00-4/30/01         $   63.00         $   427,266.00         $   35,605.50

          5/1/01-4/30/02         $   65.52         $   444,356.64         $   37,029.72

          5/1/02-4/30/03         $   68.14         $   462,125.48         $   38,510.46

          5/1/03-4/30/04         $   70.86         $   480,572.52         $   40,047.71

          5/1/04-4/30/05         $   73.70         $   499,833.40         $   41,652.78

          5/1/05-4/30/06         $   76.65         $   519,840.30         $   43,320.03

          5/1/06-4/30/07         $   79.92         $   542,017.44         $   45,168.12

          5/1/07-4/30/08         $   83.12         $   563,719.84         $   46,976.65


         All such Base Rent shall be payable by Tenant in accordance with the
         terms of Article 3 of the Lease.

         Landlord and Tenant acknowledge that the foregoing schedule is based on
         the assumption that the Sixth Expansion Effective Date is the Target
         Sixth Expansion Effective Date. If the Sixth Expansion Effective Date
         is other than the Target Sixth Expansion Effective Date, the schedule
         set forth above with respect to the payment of any Installment(s) of
         Base Rent for the Sixth Expansion Space shall be appropriately adjusted
         on a per diem basis to reflect the actual Sixth Expansion Effective
         Date and the actual Sixth Expansion Effective Date shall be set forth
         in a confirmation letter to be prepared by Landlord. However, the
         effective date of any increases or decreases in the Base Rent rate
         shall not be postponed as a result of an adjustment of the Sixth
         Expansion Effective Date as provided above.

III.     Additional Security Deposit. Upon Tenant's execution hereof, Tenant
         ---------------------------
         shall pay Landlord the sum of $35,605.50 which is added to and becomes
         part of the Security Deposit, if any, held by Landlord as provided
         under the Lease as security for payment of Rent and the performance of
         the other terms and conditions of the Lease by Tenant. Accordingly,
         simultaneous with the execution hereof, the Security Deposit is
         increased from $66,832.00 to $102,437.50.

IV.      Tenant's Share. For the period commencing with the Sixth Expansion
         --------------
         Effective Date and ending on the Expiration Date, Tenant's Share for
         the Sixth Expansion Space is 4.85%.

V.       Additional Rent. For the period commencing with the Sixth Expansion
         ---------------
         Effective Date and ending on the Expiration Date, Tenant shall pay
         Additional Rent applicable to the Sixth Expansion Space in accordance
         with the terms of the Lease, provided, however, during such period the
         Base Year for the computation of Additional Rent applicable to the
         Sixth Expansion Space is 2000.

VI.      Improvements to Sixth Expansion Space.
         -------------------------------------
         A.       Condition of Sixth Expansion Space. Tenant has inspected the
                  Sixth Expansion Space and agrees to accept the same "as is"
                  without any agreements, representations, understandings or
                  obligations on the part of Landlord to perform any
                  alterations, repairs or improvements, except as may be
                  expressly provided otherwise in this Amendment.


         B.       Cost of Improvements to Sixth Expansion Space. Provided Tenant
                  is not in default, Tenant shall be entitled to receive an
                  Improvement allowance (the "Sixth Expansion Improvement
                  Allowance") In an amount not to exceed $33,910.00 (i.e., $5.00
                  per rentable square foot of the Sixth Expansion Space) to be
                  applied toward the cost of performing initial construction,
                  alteration or improvement of the Sixth Expansion Space,
                  including but not limited to the cost of space planning,
                  design and related architectural and engineering services. In
                  the event the total cost of the initial improvements to the
                  Sixth Expansion Space exceeds the Sixth Expansion Improvement
                  Allowance, Tenant shall pay for such excess upon demand. The
                  entire unused balance of the Sixth Expansion Improvement
                  Allowance, if any, shall accrue to the sole benefit of
                  Landlord. Landlord shall pay such Sixth Expansion Improvement
                  Allowance directly to the contractors retained to perform the
                  construction, design or related improvement work to the Sixth
                  Expansion Space.

         C.       Responsibility for Improvements to Sixth Expansion Space.
                  Tenant shall retain Commercial Interior Contractors ("CIC") to
                  perform any construction, alterations or improvements to the
                  Premises and such construction, alterations or improvements
                  shall be governed in all respects by the provisions of Article
                  6 of the Lease.

VII.     Early Access to Sixth Expansion Space. During any period that Tenant
         -------------------------------------
         shall be permitted to enter the Expansion Space prior to the Sixth
         Expansion Effective Date (e.g., to perform alterations or improvements,
         if any), Tenant shall comply with all terms and provisions of the
         Lease, except those provisions requiring payment of Base Rent or
         Additional Base Rent as to the Sixth Expansion Space. If Tenant takes
         possession of the Sixth Expansion Space prior to the Sixth Expansion
         Effective Date for any reason whatsoever (other than the performance of
         work in the Sixth Expansion Space with Landlord's prior approval), such
         possession shall be subject to all the terms and conditions of the
         Lease and this Amendment, and Tenant shall pay Base Rent and Additional
         Base Rent as applicable to the Sixth Expansion Space to Landlord on a
         per diem basis for each day of occupancy prior to the Sixth Expansion
         Effective Date.

VIII.    Other Pertinent Provisions. Landlord and Tenant agree that, effective
         --------------------------
         as of the date hereof (unless different effective date(s) is/are
         specifically referenced in this Section), the Lease shall be amended in
         the following additional respects:

         A.       Notwithstanding anything to the contrary set forth in the
                  Lease, Operating Expenses shall include, to the extent
                  permitted by applicable laws, a fee for the services provided
                  by Landlord in connection with the selection of utility
                  companies and the negotiation and administration of contracts
                  for electricity, provided that such fee shall not exceed 50%
                  of any savings obtained by Landlord.

         B.       Parking. During the term for the Sixth Expansion Space,
                  -------
                  Landlord shall provide Tenant, free of charge on an
                  unassigned, non-exclusive and unlabelled basis, up to 23
                  additional parking spaces in the Parking facility in
                  accordance with all of the provisions of Paragraph 1 of the
                  Additional Provisions Rider to the Lease.

         C.       Letter of Credit. Upon execution of this Amendment, Tenant
                  ----------------
                  shall deliver to Landlord, subject to the provisions of
                  Paragraph 2 of the Additional Provisions Rider to the Original
                  Lease, either (i) an amendment to the existing Letter of
                  Credit increasing the amount of the existing Letter of Credit
                  by $316,177.00 or (ii) in addition to the existing Letter of
                  Credit, a new Letter of Credit in the amount of $316,177.00.

IX.      Miscellaneous.
         -------------
         A.       This Amendment sets forth the entire agreement between the
                  parties with respect to the matters set forth herein. There
                  have been no additional oral or written representations or
                  agreements. Under no circumstances shall Tenant be entitled to
                  any Rent abatement, improvement allowance, leasehold
                  improvements, or other work to the Premises, or any similar
                  economic incentives that may have been provided Tenant in
                  connection with entering into the Lease, unless specifically
                  set forth in this Amendment.

                                       -3-


         B.       Except as herein modified or amended, the provisions,
                  conditions and terms of the Lease shall remain unchanged and
                  in full force and effect.

         C.       In the case of any inconsistency between the provisions of the
                  Lease and this Amendment, the provisions of this Amendment
                  shall govern and control.

         D.       Submission of this Amendment by Landlord is not an offer to
                  enter into this Amendment but rather is a solicitation for
                  such an offer by Tenant. Landlord shall not be bound by this
                  Amendment until Landlord has executed and delivered the same
                  to Tenant.

         E.       The capitalized terms used in this Amendment shall have the
                  same definitions as set forth in the Lease to the extent that
                  such capitalized terms are defined therein and not redefined
                  in this Amendment.

         F.       Tenant hereby represents to Landlord that Tenant has dealt
                  with no broker in connection with this Amendment. Tenant
                  agrees to indemnify and hold Landlord, its members,
                  principals, beneficiaries, partners, officers, directors,
                  employees, mortgagee(s) and agents, and the respective
                  principals and members of any such agents (collectively, the
                  "Landlord Related Parties") harmless from all claims of any
                  brokers claiming to have represented Tenant in connection with
                  this Amendment. Landlord hereby represents to Tenant that
                  Landlord has dealt with no broker in connection with this
                  Amendment. Landlord agrees to indemnify and hold Tenant, its
                  members, principals, beneficiaries, partners, officers,
                  directors, employees, and agents, and the respective
                  principals and members of any such agents (collectively, the
                  "Tenant Related Parties") harmless from all claims of any
                  brokers claiming to have represented Landlord in connection
                  with this Amendment.

         IN WITNESS WHEREOF, Landlord and Tenant have duly executed this
Amendment as of the day and year first above written.

                                       LANDLORD:

                                       EOP-BAY PARK PLAZA, L.L.C., a Delaware
                                       limited liability company

                                       By: EOP Operating Limited Partnership, a
                                           Delaware limited partnership, its
                                           sole member

                                           By: Equity Office Properties Trust, a
                                               Maryland real estate investment
                                               trust, its general partner

                                               By: /s/ ROBERT E. DEZZUTTI
                                                   -----------------------------
                                                   Name: Robert E. Dezzutti
                                                         -----------------------
                                                   Title: Vice President
                                                          ----------------------

                                       TENANT:

                                       CROSSWORLD SOFTWARE, INC.,
                                       a Delaware corporation

                                       By:    /s/ MARK KENT
                                              --------------------------
                                       Name:  Mark Kent
                                              --------------------------
                                       Title: CFO
                                              --------------------------
                                       By:
                                              --------------------------
                                       Name:
                                              --------------------------
                                       Title:
                                              --------------------------


                                       -4-


                                   EXHIBIT A

                                Attach Floor Plan

                          Showing Sixth Expansion Space




                   [GRAPHIC OF BAY PARK PLAZA APPEARS HERE]





         BAY PARK PLAZA  SIXTH FLOOR