CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in the Registration Statement (Form
S-8) pertaining to the Planning Sciences International plc 1996 Equity Incentive
Plan of our  report  dated  June  29,  1998  with  respect  to the  consolidated
financial  statements and schedule of Gentia Software plc included in its Annual
Report  (Form  20-F)  for the year  ended  December  31,  1997,  filed  with the
Securities and Exchange Commission.



                                            /s/ERNST & YOUNG
                                               ERNST & YOUNG                    





London, England
November 25, 1998