<PAGE>
                                                                    EXHIBIT 10.4


                              LEASE AMENDMENT NO. 3

This Agreement, made this 5 day of August, 1999, by and between BLN Office
Park Associates ("Landlord") and Adaytum Software Limited ("Tenant").

         Whereas, the Landlord and the Tenant entered into a written
agreement of Lease dated September 16, 1998 (herein collectively called the
"Lease"), whereby the Landlord leased to the Tenant approximately 10,300
square feet of office space located on the fourth level of Phase II of the
BLN Office Park, to be used and occupied as the Tenant's office for the
transaction of its business; and

         Whereas, the Landlord and the Tenant entered into Lease Amendment
No. 1 dated October 19, 1998 whereby the Lease was extended; and

         Whereas, the Landlord and the Tenant entered into Lease Amendment
No. 2 dated January 7, 1999, whereby the Lease was extended; and

         Now therefore, in consideration of the foregoing premises; the
parties hereto hereby agree to supplement and amend this Lease effective as
of the 1st day of November 1999 in the following particulars:

         1.       In reference to the Lease and pertaining to Section 2 LEASED
                  PREMISES, after the words "those certain premises comprising
                  approximately" in the printed portion of the Lease change the
                  rentable area from "10,300" to "33,809".

         2.       In reference to Article 1 of Lease Amendment No. 2, in Section
                  3, TERM, after the words "to and including the", in the
                  printed portion of the Lease change the date from "31st day of
                  January, 2005" to the "31st day of July, 2006".

         3.       In reference to Article 2 of Lease Amendment No. 2 and
                  pertaining to BASE RENT payable in Section 4 of the printed
                  portion of the Lease shall be as follows:
<TABLE>
<CAPTION>
                  PERIOD                                    ANNUAL BASE RENT         MONTHLY BASE RENT
                  ------                                    ----------------         -----------------
         <S>                                                <C>                      <C>
         February 1, 1999 through and including
         October 31, 1999                                   $233,810.04              $19,484.17

         November 1, 1999 through and including
         December 31, 1999                                  $417,634.60              $34,802.88

         January 1, 2000 through and including
         March 31, 2000                                     $601,436.50              $50,119.71

         April 1, 2000 through and including
         June 30, 2000                                      $684,450.40              $57,037.53

         July 1, 2000 through and including
         July 31, 2006                                      $767,464.30              $63,955.36
</TABLE>

The Base Rent is also subject to increase due to increases in operating costs
and taxes as described in paragraphs 5 and 6 of the Lease.

         4.       In reference to Section 5 of the Lease and pertaining to
                  CONTRIBUTION TO OPERATING COSTS of the Lease, after the words,
                  "which fraction is" in paragraph (b) (ii) of the printed
                  portion on the Lease, change the factor "3.063%" to the
                  following schedule:
<TABLE>
<CAPTION>
                  PERIOD                                            PERCENTAGE
                  ------                                            ----------
         <S>                                                        <C>
         February 1, 1999 through and including
         October 31, 1999                                           3.063%

         November 1, 1999 through and including
         December 31, 1999                                          5.471%

                                       1
<PAGE>

         January 1, 2000 through and including
         March 31, 2000                                             7.879%

         April 1, 2000 through and including
         June 30, 2000                                              8.966%

         July 1, 2000 through and including
         July 31, 2006                                              10.054%
</TABLE>

                  Effective November 1, 1997, the Tenant's proportionate share
                  of the building is calculated upon 336,292 square feet, which
                  is the total square footage of both buildings of the BLN
                  Office Park.

         5.       Exhibit A of the Lease shall be substituted with Exhibit A-1
                  effective November 1, 1999.

         6.       In reference to Article 3 of Lease Amendment No. 2, and
                  pertaining to ARTICLE 2 and ARTICLE 3 of EXHIBIT F, of the
                  Lease shall be deleted in their entirety and replaced with the
                  following:

ARTICLE 2

         RENEWAL OPTION: The Tenant shall have the right to renew the Lease for
         an additional term of five (5) years ("Renewal Option") commencing
         August 1, 2006 and terminating July 31, 2011. Said Renewal Option shall
         be conditioned upon the following terms and conditions:

         a.       On or before August 1, 2005, Tenant must provide written
                  notice to Landlord of its intention to exercise its renewal
                  option.

         b.       The Base Rent charged during the Renewal Option shall be the
                  then "current market rate" charged for space in the BLN Office
                  Park. The Landlord shall provide the "current market rate" by
                  March 1, 2005.

         c.       In order to exercise the Renewal Option, the Tenant must give
                  written notice to Landlord on or before March 1, 2005 of its
                  acceptance of the "current market rate" submitted by Landlord.

         d.       During the extended term, the same terms, covenants,
                  conditions, provisions and agreements shall apply as are
                  provided for in this Lease and subject to Section 5 of the
                  printed portion of the Lease.

         e.       The Renewal Option rights of the Tenant are conditioned upon
                  the Lease being in full force and effect without default
                  thereunder on the date the Tenant exercised its Renewal Option
                  up to and including July 31, 2006.

         f.       Both Landlord and Tenant agree to amend this Lease to
                  incorporate the correct rent charges and any other changes
                  made necessary by this provision.

ARTICLE 3

         RIGHT OF FIRST OFFER 1.: This Article 3 has been exercised and is null
         and void in its entirety.

         7.       LEASEHOLD IMPROVEMENTS. In conjunction with the Tenant taking
         the remaining fourth floor space outlined on Exhibit A-1, the Landlord
         agrees to provide those Leasehold Improvements outlined in Tenant's
         plans. However, it is understood by both parties that Landlord's
         contribution will not exceed $364.390.00 for the following costs
         related to Leasehold Improvements:

         1)       Tenant's Plans

         2)       Leasehold Improvements to the Leased Premises as outlined in
                  Tenant's Plans.

                                       2
<PAGE>


Any costs incurred in excess of $364,390.00 will be the responsibility of
Tenant and will be paid by Tenant to Landlord within thirty (30) days of
completion of the Leased Premises, and invoicing.

         Area 1, further outlined in yellow on Exhibit A-1, shall be completed
         in accordance with a floor plan to be developed and ready for occupancy
         October 15, 1999.

         Area 2, further outlined in blue on Exhibit A-1 shall be completed in
         accordance with a floor plan to be developed and ready for occupancy
         January 1, 2000.

         In witness whereof, this instrument has been duly executed by the
parties hereto as of the day, month and year written above.

LANDLORD:                               TENANT:

BLN Office Park Associates II           Adaytum KPS Software Limited

By:      /S/ John R. Kofski             By:     /S/  Michael H. Mehr
   ----------------------------------      -------------------------------------

Its:     Managing Agent                 Its:    VP of Finance & Administration
    ---------------------------------       ------------------------------------