I created proforma invoice but it is not transferred to GTS. I tried to transfer manually, status shows it is released but there is an error at the top saying 'Reference number of a document from Back Error'. When I checked it in GTS, there is no custom document for proforma invoice. I checked configuration in ECC as well as GTS regarding activation of BADis, document types etc. everything looks fine. Can you please help me where to look at it and get it solved?
Thanks in advance.