MIRO Cancellation

Hi Experts,

I have created the purchase order, with reference to the purchase order i have posted the MIGO.

After MIGO i did teh MIRO against that PO also.

Afterwords i found material not OK by quality, and i tried to Cancel the GRN , while doing the 102 , system gives me the error message as , "Deficit of PU IR quantity".

What is the meaning of this error message and also what is the standard procedure to reverse /CANCELLthe MIRO document.

Also what are the entries posted during these reversal transaction.

Also what about the excise entries.

My main conern is procedure of reversal/cancellation of MIRO document and then cancellation of MIGO.

Best Regards,