Dear All

I want to change the price of item in purchase order after approval and reciept of good but before finance.
I know the process , but in some of the cases , i have comeacross that system is not allowing to change the price via session "tdpur4122m000" and
session is inactive in specific when i tried to go from purchase order.

can anbody guide me what are the various conditions in which it becomes inactive.

regds

Amit Rawal