Change Price to ZERO on Purchase Order Confirmation IDoc (ORDRSP)

Hi,

  We have a scenario where the Purchase Order has $ value and when we get confirmation IDoc(ORDRSP) from the vendor, the IDoc has ZERO price.

I'm able to change the price but cannot make it to accept ZERO.

This works when we manually change the PO by un-checking IR(Invoice Receipt-REPOS) field. Is there a way to make this work through IDoc.

Thank you in advance.

Regards,

Ram