Diagnosis
You are using a country or customer enhancement to influence thevalidity and deduction intervals for absence quota generation.
As described in the documentation on customer enhancement "011" in SAPenhancement HRPTIM03, you are not permitted to change the validityinterval if the enhancement is called from transaction PA30, PA61, orreport RPTQTA00, since there is already a predefined mechanism.

Procedure
Change the logic of the enhancement. Ensure that you take account ofparameter XCALLTYPE.
More specifically: If XCALLTYPE = "D", you must not change the validityinterval.