How To Fix ALSMEX019 - Select a field assignment before executing the function

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 019

• Message text: Select a field assignment before executing the function

What causes this issue?

You want to display or make a field assignment, but you have not
selected a field assignment.

How to fix this error?

Select a field assignment in table control.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ALSMEX019 - Select a field assignment before executing the function ?

  The SAP error message ALSMEX019 ("Select a field assignment before executing the function") typically occurs in the context of using the LSMW (Legacy System Migration Workbench) tool in SAP. This error indicates that the user has not selected a field assignment for the data migration process before attempting to execute a function, such as starting the data upload or processing.
  Cause:
  The error is caused by one of the following reasons:
  
  No Field Assignment Selected: The user has not selected any field mapping or assignment in the LSMW project.
  Incorrect Sequence of Steps: The user may be trying to execute a function without completing the necessary prior steps, such as defining the field mapping.
  Incomplete Configuration: The LSMW project may not be fully configured, leading to missing field assignments.
  
  Solution:
  To resolve the ALSMEX019 error, follow these steps:
  
  
  Select Field Assignment:
  
  Go to the LSMW project where you encountered the error.
  Navigate to the "Field Mapping and Conversion Rules" section.
  Ensure that you have selected the appropriate field assignments for the source fields to the target fields.
  
  
  
  Check Configuration:
  
  Verify that all necessary configurations for the LSMW project are complete. This includes defining the source structure, field mapping, and any conversion rules.
  Make sure that you have saved your changes after making any selections.
  
  
  
  Follow the Correct Sequence:
  
  Ensure that you are following the correct sequence of steps in LSMW. Typically, you need to:
  
  Define the project and subproject.
  Maintain the object.
  Specify the source structure.
  Map the fields.
  Convert the data.
  Finally, execute the data upload.
  
  
  
  
  
  Recheck the Data:
  
  If you are using a recording, ensure that the recording is correctly set up and that all necessary fields are included.
  
  
  
  Consult Documentation:
  
  If you are still facing issues, refer to the SAP documentation or help resources for LSMW to ensure that you are following the correct procedures.
  
  
  
  Related Information:
  
  LSMW (Legacy System Migration Workbench): A tool used in SAP for data migration from legacy systems to SAP systems.
  Field Mapping: The process of defining how fields in the source data correspond to fields in the target SAP system.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues or provide additional guidance related to LSMW and this error message.
  
  By ensuring that you have selected the appropriate field assignments and followed the correct steps in LSMW, you should be able to resolve the ALSMEX019 error and proceed with your data migration tasks.