How To Fix B1118 - The IDoc type for this message must not be reduced

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 118

• Message text: The IDoc type for this message must not be reduced

What causes this issue?

This message may be used only as a reference for a reduction.

System Response

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

How to fix this error?

Use a new message with a reference message.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message B1118 - The IDoc type for this message must not be reduced ?

  The SAP error message B1118, "The IDoc type for this message must not be reduced," typically occurs when there is a mismatch between the expected structure of an IDoc (Intermediate Document) and the actual structure being sent or received. This error is often related to the configuration of IDocs in the SAP system, particularly when there are changes in the IDoc type or its segments.
  Cause:
  
  IDoc Structure Changes: The IDoc type has been modified, and the new structure does not match the expected structure. This can happen if segments have been added or removed.
  Message Type Configuration: The message type associated with the IDoc may have been incorrectly configured or not updated after changes were made to the IDoc type.
  Inconsistent Data: The data being sent may not conform to the expected structure defined in the IDoc type, leading to a reduction in the expected fields.
  Version Mismatch: There may be a version mismatch between the sender and receiver systems regarding the IDoc type.
  
  Solution:
  
  Check IDoc Type Configuration: Verify the configuration of the IDoc type in transaction WE30 (IDoc Types) and ensure that it matches the expected structure.
  Review Message Type: Check the message type associated with the IDoc in transaction WE81 (Message Types) and ensure it is correctly configured to use the appropriate IDoc type.
  Update IDoc Definitions: If there have been changes to the IDoc structure, ensure that all relevant systems are updated with the new definitions. This may involve regenerating the IDoc type or message type.
  Data Validation: Validate the data being sent to ensure it conforms to the expected structure. This may involve checking the data mapping or transformation logic.
  Check for Custom Enhancements: If there are any custom enhancements or modifications in the IDoc processing logic, review them to ensure they are not causing the issue.
  Consult Documentation: Refer to SAP documentation or notes related to IDoc processing for any specific guidance or known issues.
  
  Related Information:
  
  Transaction Codes:
  
  WE30: IDoc Types
  WE81: Message Types
  WE20: Partner Profiles
  WE19: Test Tool for IDocs
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  IDoc Monitoring: Use transaction WE02 or WE05 to monitor IDocs and check for any additional error messages or details that may help in diagnosing the issue.
  
  By following these steps, you should be able to identify the root cause of the B1118 error and implement the necessary changes to resolve it.