Diagnosis
You want to create a posting document per trip and assign each of thesedocuments/postings the start or end date of the trip.

System Response
The system checks the time validity of tax code and account assignmentobjects. With a date per trip, each individual trip must be checkedinstead of one general check of all trips. Depending on the number oftrips, tax codes and account assignment objects, this can be much moretime-consuming in some cases.

Procedure
Reconsider whether the posting/document date per trip setting is reallynecessary.