How To Fix /SAPDMC/LSMW_OBJ_040007 - Delete all source fields but one first.

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPDMC/LSMW_OBJ_040 -

• Message number: 007

• Message text: Delete all source fields but one first.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPDMC/LSMW_OBJ_040007 - Delete all source fields but one first. ?

  The SAP error message /SAPDMC/LSMW_OBJ_040007 typically occurs in the context of using the Legacy System Migration Workbench (LSMW) in SAP. This error indicates that you are trying to delete source fields in a mapping or structure, but you need to retain at least one source field before proceeding with the deletion.
  Cause:
  The error arises when you attempt to delete all source fields from a mapping or structure in LSMW. LSMW requires at least one source field to remain in the mapping to ensure that there is a valid reference for the data transformation or migration process. 
  Solution:
  To resolve this error, follow these steps:
  
  
  Identify the Source Fields: Review the source fields that are currently mapped in your LSMW project.
  
  
  Retain One Source Field: Before attempting to delete any source fields, ensure that at least one source field remains in the mapping. You can do this by:
  
  Selecting the source field you want to keep.
  Proceeding with the deletion of other fields as needed.
  
  
  
  Save Changes: After making the necessary adjustments, save your changes in the LSMW project.
  
  
  Re-attempt the Operation: Once you have retained at least one source field, you can try to perform the operation that previously triggered the error.
  
  
  Related Information:
  
  LSMW Overview: LSMW is a tool in SAP used for data migration from legacy systems to SAP systems. It allows users to map fields from the source data to the target SAP structure.
  Field Mapping: Proper field mapping is crucial in LSMW to ensure that data is correctly transferred and transformed during the migration process.
  Documentation: Refer to SAP documentation or help resources for detailed guidance on using LSMW, including field mapping and data migration best practices.
  
  If you continue to experience issues or if the error persists after following these steps, consider checking for any additional constraints or settings in your LSMW project that may be affecting the field mappings.