If you run changes for sales order with these settings:
You can see better the correct sequence of changes up to a second with tcode and changed value:
@Shiva: I thought in standard systems critical fields check is performed no matter what is the credit exposure. Which setting did you have in mind, that bypasses critical fields check (they don't use routines and exits in OVA8)?
My idea was to see if the order was created originally with wrong payment term and was blocked, then somebody changed ZERM to the correct value.This means that after changing ZTERM to the correct value, the status will be CMGST = B, CMPSD = B.
Rechecking the order from VKM4 will not change these statuses (except if they have the modification from note 805007).
If they release from VKM4, the status will be CMGST = D, CMPSD = B.
After that, if they recheck the order, it will become CMGST = A, CMPSD = A.
@Durga: What happens if you recheck the order in VKM4 - does it get blocked?