How To Fix WP311 - Segment & is not assigned to any processing function

SAP Error Message - Details

• Message type: E = Error

• Message class: WP - Messages from POS interface

• Message number: 311

• Message text: Segment & is not assigned to any processing function

What causes this issue?

No processing function is known to the parser for
segment & of the IDOC to be processed.

System Response

The IDOC cannot be processed. The documents concerned in the SAP
system will not be posted.

How to fix this error?

This problem can be due to one of the following reasons:
Check whether the proper processing function has been assigned to the
IDOC category in workflow.
If the problem cannot be solved in this way, then there is an error in
the program. In this case contact the SAP hotline.

Error message extract from SAP system. Copyright SAP SE.