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Check a condition and then put the transaction as read-only

Hello people,

I need to make a check in Purchase Order (ME21N and ME23N), so that when the user enter in transaction, I will check if the invoice was registered and then put the purchase order in "read only" state.

How do you suggest me to do it?

Loop at screen? Is there a state flag to set?

Thanks a lot!!!

Former Member
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