PR not getting tranferred from APO to ECC for one location

Hello everybody,

I'm facing a problem when  PR is getting created in the APO system. The PR does not get transferred to APO for one particular location.

The same product for another location works absolutely fine. Also when creating a PR in ECC and ticking the 'SC Vendor' box the PR gets transferred from ECC to APO. When this tick box is unchecked then the PR is not transferred from ECC to APO.

So the reverse scenario works when the 'SC Vendor' check box is ticked.

I'm guessing there must be something in the APO side that we are missing similar to the SC vendor check box which is stopping this PR from getting  transferred.

Can you give me any possible clues to where I should be looking for this problem.

Thanks in advance.