Error while determining the form function module

Hi everyone,

We are experiencing problems while displaying one adobe form in ESS. It’s the Travel Expense form (PTRV_EXPENSE_FORM). When pressing the button to “Display/Print” the form we get an error message: "Error while determining the form function module", and no form I shown. The ADS server is configured correctly and there are other forms that are actually working, for example the Travel Request form. We are running WAS 7.0 with SP12.

Anyone has an idea what can cause the problem? Any help is greatly appreciated.

Thanks in advance!

Regards,

Sophie