How To Fix /SAPDMC/LSMW304 - Define the identification of the source structures first

/SAPDMC/LSMW304 - Overview

• Message type: E = Error

• Message class: /SAPDMC/LSMW -

• Message number: 304

• Message text: Define the identification of the source structures first

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPDMC/LSMW304 - Define the identification of the source structures first ?

  The SAP error message /SAPDMC/LSMW304 indicates that there is an issue with the configuration of the Legacy System Migration Workbench (LSMW) in SAP. Specifically, it suggests that the identification of the source structures has not been defined before attempting to execute a migration project.
  
  Cause:
  The error typically occurs when:
  
  The source structures for the data migration have not been defined in the LSMW project.
  The project or subproject is not properly set up to include the necessary source structure definitions.
  There may be a missing or incorrect mapping between the source and target structures.
  
  
  Solution:
  To resolve this error, follow these steps:
  
  
  Define Source Structures:
  
  Go to the LSMW transaction (LSMW).
  Select the appropriate project and subproject.
  Navigate to the "Maintain Source Structures" option.
  Define the source structures that you will be using for the data migration. Ensure that you specify the correct structure names and attributes.
  
  
  
  Check Mapping:
  
  After defining the source structures, ensure that you have mapped them correctly to the