Which version and PU?

With 2014 PU1 you can enter a zero value PO invoice - prior to that you cannot.

We are on Sage300 2014 update 1

Then you can do a zero PO invoice.

it is not letting us do a $0 invoice, hence this post :)

You mentioned that the receipt was for 0. Have you tried to do a return against that receipt instead of attempting to invoice it.

Note that a zero Invoice should work with the PU but why not just try a PO Return against the Receipt.

Doing a return is not going to "close out" the receipt.

Then you don't have PU1 installed. I definitely works.

Then you don't have PU1 installed. I definitely works.