The system could not generate and/or communicate at least one of the documents to the supplier or th

Hello,

My customer noticed that for all POs we have PO PDF error

PO -> Inquire -> View approval through workflow -> Workflow Details

"The system could not generate and/or communicate at least one of the documents to the supplier or the approver. Please contact the system administrator. "

We have not got any problems with PO print, workflow, notifications and mails, so why system display error?

I saw that at Vision environment error occurs too.

Thank You,

Monika