Outside Operations PO not getting created

Hi,

I have a work order an item for which there is a valid routing and BOM. this item also has a *OP10 outside operations item under that Branch. But for some reason when we run R5931410 it is not creating the Purchase order for Outside operations. In the F3112.RORN field, we get a value *NO PO instead of a valid PO number. Can you please tell me what could be a reason for this?