How To Fix WS168 - Internal error calling communication structure for document &1

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 168

• Message text: Internal error calling communication structure for document &1

What causes this issue?

bis auf ersten Satz identisch mit WS 169, WS 170
Communication structure MCWBRK for document &V1& could not be compiled
Without the communication struture, it is not possible to update data in
the Logistics Information System.

System Response

No update is carried out for any of the documents currently being
processed. Data is not updated in the Logistics Information System for
either Settlement Management itself or subsequent settlement (business
volume or income (in the case of a settlement document)).

How to fix this error?

Contact your system administrator, as this situation should not occur.
It is probably due to a program error.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WS168 - Internal error calling communication structure for document &1 ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WS168 Internal error calling communication structure for document &1
  
  Cause:
  This error typically occurs during ALE/IDoc processing when SAP tries to call or process the communication structure (usually a function module or a BAPI) related to a specific document type, but encounters an internal problem. The placeholder &1 is replaced by the document number or type involved.
  Common causes include:
  
  Incorrect or missing partner profile configuration for the document type.
  Missing or incorrect function module assignment in the distribution model or partner profile.
  Authorization issues preventing the system from executing the communication structure.
  Inconsistent or corrupted IDoc data or metadata.
  Custom enhancements or user exits that fail during processing.
  Transport or system inconsistencies where the communication structure is not properly imported or activated.
  
  
  Solution:
  To resolve the WS168 error, follow these steps:
  
  
  Check Partner Profile Configuration:
  
  Go to transaction WE20.
  Verify the partner profile for the partner and message type involved.
  Ensure the correct inbound/outbound parameters and function modules are assigned.
  
  
  
  Verify Distribution Model:
  
  Use transaction BD64.
  Check if the distribution model is correctly maintained for the document/message type.
  Ensure the correct function module or processing code is assigned.
  
  
  
  Check Function Module or BAPI:
  
  Identify the communication structure or function module being called.
  Test the function module independently in SE37 to see if it executes without errors.
  If custom enhancements exist, debug or review the code for errors.
  
  
  
  Review Authorization:
  
  Ensure the user or background job executing the process has the necessary authorizations.
  
  
  
  Check IDoc Status and Data:
  
  Use WE02 or WE05 to inspect the IDoc.
  Look for any data inconsistencies or errors in segments.
  
  
  
  Debug the Process:
  
  If the error persists, debug the processing function module to identify the exact point of failure.
  
  
  
  Check for OSS Notes:
  
  Search SAP OSS Notes for WS168 related to your SAP version and module.
  Apply any relevant patches or corrections.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  WE20 – Partner Profiles
  BD64 – Distribution Model
  WE02 / WE05 – IDoc Display
  SE37 – Function Module Test
  SM58 – Check for transactional RFC errors
  
  
  
  Common SAP Modules Involved:
  
  ALE (Application Link Enabling)
  IDoc Processing
  EDI (Electronic Data Interchange)
  
  
  
  SAP Notes and Documentation:
  
  Check SAP Support Portal for notes related to WS168.
  Review SAP Help documentation on ALE and IDoc processing.
  
  
  
  
  If you provide the exact document type or scenario, I can help you with more specific guidance.