To set the system to prohibit/warn the posting of IR in case the value of Invoice exceeds the value of PO, the following procedures can be applied:

1) Use Transaction Code OMR6 to change the tolerance limit;

2) Use Transaction Code OMRM to define the Error/Warning Message for LIV.

3) Insert the Message No. 084 and set the "Online" indicator as W (for Warning) or E (for Error) message.
 

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