AGREEMENT RELATING TO JOINT FILING OF SCHEDULE 13G The undersigned hereby agree that, without admitting beneficial ownership, a single Schedule 13G (or any amendment thereto) relating to the Common Stock of i2 Technologies, Inc. shall be filed on...

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                                    EXHIBIT A

                       AGREEMENT RELATING TO JOINT FILING
                                 OF SCHEDULE 13G


         The undersigned hereby agree that, without admitting beneficial
ownership, a single Schedule 13G (or any amendment thereto) relating to the
Common Stock of i2 Technologies, Inc. shall be filed on behalf of each of the
undersigned and that this Agreement shall be filed as an exhibit to such
Schedule 13G.

Dated: February 15, 1999


                                      /s/ Xxxxxx X. Xxxxx
                                      -----------------------------------------
                                      Xxxxxx X. Xxxxx



                                      XXXXX-XXXXX FAMILY INVESTMENTS, LTD.


                                      By: /s/ Xxxxxx X. Xxxxx
                                      -----------------------------------------
                                      Xxxxxx X. Xxxxx, Managing General Partner