How To Fix LK059 - Segment E1MBXYJ could not be assigned to segment E1MBXYI

SAP Error Message - Details

• Message type: E = Error

• Message class: LK - WM -> SUB connection messages

• Message number: 059

• Message text: Segment E1MBXYJ could not be assigned to segment E1MBXYI

What causes this issue?

When analysing inbound IDoc WMMBID01, the system was unable to assign
the segment because the IDoc structure has errors.

System Response

The system issues an error message and does not process the IDoc.

How to fix this error?

Display the IDoc and check its structure. In particular, you should
verify whether the sequence of the IDoc segments is identical with the
hierarchical structure defined in IDoc maintenance.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message LK059 - Segment E1MBXYJ could not be assigned to segment E1MBXYI ?

  The SAP error message LK059, which states that "Segment E1MBXYJ could not be assigned to segment E1MBXYI," typically occurs in the context of IDoc processing, particularly when dealing with the inbound or outbound processing of IDocs related to material documents or similar transactions.
  Cause:
  The error usually arises due to one of the following reasons:
  
  
  Data Structure Mismatch: The segments E1MBXYJ and E1MBXYI are part of the IDoc structure, and this error indicates that there is a mismatch in the expected data structure. This could be due to missing mandatory fields or incorrect data types.
  
  
  Configuration Issues: There may be configuration issues in the IDoc type or message type that prevent the segments from being correctly assigned.
  
  
  Inconsistent Data: The data being sent or received may not conform to the expected format or structure, leading to assignment issues.
  
  
  Version Mismatch: If there are different versions of the IDoc structure being used, it can lead to compatibility issues.
  
  
  Solution:
  To resolve the LK059 error, you can take the following steps:
  
  
  Check IDoc Structure: Verify the structure of the IDoc being processed. Ensure that the segments E1MBXYJ and E1MBXYI are correctly defined and that all required fields are populated.
  
  
  Review Mapping: If you are using a middleware or mapping tool, check the mapping configuration to ensure that the segments are correctly mapped to each other.
  
  
  Validate Data: Ensure that the data being sent in the IDoc conforms to the expected format. Check for any missing or incorrect data that could cause the assignment to fail.
  
  
  Configuration Review: Review the configuration settings for the IDoc type and message type in transaction WE30 (IDoc Types) and WE81 (Message Types) to ensure they are set up correctly.
  
  
  Check for Updates: If you are using a custom IDoc or have made changes to the IDoc structure, ensure that all relevant components are updated and consistent.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific IDoc type you are working with for any known issues or additional troubleshooting steps.
  
  
  Debugging: If the issue persists, consider debugging the IDoc processing to identify the exact point of failure and gather more information about the data being processed.
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like WE02 (Display IDoc), WE19 (Test IDoc), and WE30 (IDoc Types) to analyze and troubleshoot IDoc issues.
  SAP Notes: Check SAP Notes for any known issues related to the specific IDoc type or message type you are working with.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify the root cause of the LK059 error and implement a suitable solution.