I got the problem with action message in our AX 2009 system as follows.
1/ All Planned Production order & BOM line & Purchase order got CANCEL action message when existing an inventory journal (transfer/counting) after refreshing MRP/MPS.
This caused incorrect information when we process to cancel the Purchase order.
2/ But when I click on button Update/Master scheduling for specific item in its Net requirement, the action message of Purchase order changes from CANCEL to ADVANCE/POSTPONE.
It turns to correct information to pull in or push out instead of CANCEL.
I don't know why this happened, and why there is the different between Batch Master scheduling & Individual Master scheduling refresh.
I setup the Coverage group as follows
1/ For FG & Semi FG: Period 1 day, Time fence = 400days, Positive = Negative = 400days, Explosion time fence = 400days, Action time fence = 400days.
2/ For Item: Period 30 days, Time fence = 400days, Positive = Negative = 400days, Explosion time fence = 400days, Action time fence = 400days.
Pls help me to understand about this and how I can fix it.
Thanks so much,