How To Fix WP309 - Segment & does not exist in IDoc &

WP309 - Overview

• Message type: E = Error

• Message class: WP - Messages from POS interface

• Message number: 309

• Message text: Segment & does not exist in IDoc &

What causes this issue?

When this IDoc was processed, the system tried to access an IDoc
segment which does not exist.

System Response

The system cannot process the data.

How to fix this error?

This is probably a program error. Contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

WP309 - Details

• The SAP error message:
  WP309 Segment & does not exist in IDoc &
  typically occurs during IDoc processing, indicating that a particular segment expected in the IDoc structure is missing.
  
  Cause
  
  The IDoc processing logic (e.g., a function module, user exit, or standard processing routine) expects a specific segment to be present in the IDoc.
  However, the segment is not found in the IDoc data received or being processed.
  This can happen if:
  The IDoc was not generated correctly and the segment was omitted.
  The segment is optional but the processing logic incorrectly assumes it is mandatory.
  There is a mismatch between the IDoc type/version expected and the actual IDoc.
  The IDoc was modified or truncated during transmission.
  
  
  
  
  Solution
  
  
  Check the IDoc structure and data:
  
  Use transaction WE02 or WE05 to display the IDoc.
  Verify if the segment mentioned in the error message actually exists in the IDoc.
  Confirm the IDoc type and version (basic type and message type).
  
  
  
  Verify the IDoc type and version:
  
  Ensure that