Validation rule is :If GL account is not in this set, should not allow postings to WBS elements.
I have created an account assignment validation for WBS elements using below logic
BSEG-PROJK IN Y-WBS (this is a set)
BSEG-HKONT IN Y-GL(This is a set)
This logic is working fine,if i enter WBS elements in Y-WBS set.but we have thousands of projects and we create few more every day.so we can't enter all of WBS elements in the set.
Is there any other way to create a validation rule or enter all WBS elements in the set ?