Item Category 04000 not allowed in accounting transaction 0300/0001

Hello,

When posting an FB60/65 using a Cash account (item category 04000) we receive the error Item Category 04000 not allowed in accounting transaction 0300/0001. I understand the logic of the error and how to correct it.

In my Document Splitter config GSP_VD, when I look up Bus Transaction 0300, variant 0001, I do not have a setting for 04000.

From the SAP Help, you do not need a setting for every item category.

My question is: Is there additional SAP logic not in the Customizing that prevents this? 

When I make the same posting using a different Document Type that is set to 0100/0001, the posting works, even though 0100/0001 also does not have an entry for 04000 item category in GSP_VD. So I don't believe that the error is triggered by 04000 missing from GSP_VD.

Thanks!