How To Fix ALSMEX011 - Master record field already assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: ALSMEX - Message Class for Legacy Data Transfer

• Message number: 011

• Message text: Master record field already assigned

What causes this issue?

You already assigned the selected master record field to a field in the
input file.

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?

Cancel the existing assignment of the asset master record field. Or
assign the selected field of the input file to a different master
record field.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ALSMEX011 - Master record field already assigned ?

  The SAP error message ALSMEX011: Master record field already assigned typically occurs when you are trying to upload data into the SAP system using the LSMW (Legacy System Migration Workbench) tool, and there is an issue with the assignment of fields in the master data record.
  Cause:
  This error usually arises due to one of the following reasons:
  
  Duplicate Assignments: The field you are trying to assign in the master record is already assigned to another field or has already been populated in the current session.
  Incorrect Mapping: The mapping of fields in the LSMW project may not be set up correctly, leading to conflicts in data assignment.
  Data Integrity Issues: The data being uploaded may have integrity issues, such as trying to assign a value to a field that is not allowed or is already filled.
  
  Solution:
  To resolve the ALSMEX011 error, you can follow these steps:
  
  
  Check Field Assignments:
  
  Review the field assignments in your LSMW project. Ensure that each field is only assigned once and that there are no duplicate assignments.
  
  
  
  Review Mapping:
  
  Go to the mapping section of your LSMW project and verify that the source fields are correctly mapped to the target fields in the master record. Make sure that the mapping does not lead to conflicts.
  
  
  
  Data Validation:
  
  Validate the data you are trying to upload. Ensure that there are no duplicate entries or invalid data that could cause conflicts with existing records.
  
  
  
  Clear Previous Data:
  
  If you are trying to upload data that may conflict with existing records, consider clearing or updating the existing data before performing the upload.
  
  
  
  Test with Sample Data:
  
  Before running the full upload, test the process with a small sample of data to identify any potential issues without affecting the entire dataset.
  
  
  
  Check for Custom Logic:
  
  If there are any custom enhancements or user exits in the master data transaction, check if they are causing the issue. You may need to consult with your ABAP team if custom logic is involved.
  
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like LSMW to access the Legacy System Migration Workbench and SE11 to check the data dictionary for the master record structure.
  Documentation: Refer to SAP documentation or help files related to LSMW for detailed guidance on field mapping and data uploads.
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message ALSMEX011.
  
  By following these steps, you should be able to identify and resolve the cause of the ALSMEX011 error in your SAP system.