How To Fix AXT_GEN204 - Use only complex types that are defined in DDIC

SAP Error Message - Details

• Message type: E = Error

• Message class: AXT_GEN - Generation framework

• Message number: 204

• Message text: Use only complex types that are defined in DDIC

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message AXT_GEN204 - Use only complex types that are defined in DDIC ?

  The SAP error message AXT_GEN204, which states "Use only complex types that are defined in DDIC," typically occurs when you are working with ABAP (Advanced Business Application Programming) and trying to use complex data types that are not defined in the Data Dictionary (DDIC). This error is often encountered in scenarios involving the definition of structures, tables, or other complex types in ABAP programs or when working with Web Services, OData services, or other integration scenarios.
  Cause:
  
  Undefined Complex Types: The error arises when you attempt to use a complex type (like a structure or table type) that has not been defined in the Data Dictionary (DDIC).
  Incorrect Data Type Usage: You may be using a data type that is not recognized by the system or is not compatible with the expected types in the context you are working in.
  Inconsistent Definitions: If you have defined a complex type in your ABAP program but have not created a corresponding definition in the DDIC, this error will occur.
  
  Solution:
  
  
  Define Complex Types in DDIC:
  
  Go to the Data Dictionary (transaction SE11).
  Create a new structure or table type that matches the complex type you are trying to use.
  Ensure that all fields within the structure or table type are properly defined.
  
  
  
  Use Existing DDIC Types:
  
  Instead of creating new types, check if there are existing types in the DDIC that meet your requirements. You can use transaction SE11 to search for existing structures or table types.
  
  
  
  Check for Typos:
  
  Ensure that there are no typographical errors in the names of the complex types you are using. The names must match exactly with those defined in the DDIC.
  
  
  
  Recompile and Activate:
  
  After making changes to the DDIC or your ABAP code, make sure to activate the changes and recompile your program to see if the error persists.
  
  
  
  Review Context:
  
  If you are working with OData services or Web Services, ensure that the service definitions are correctly referencing the DDIC types.
  
  
  
  Related Information:
  
  Data Dictionary (DDIC): The central repository in SAP for defining and managing data structures, including tables, views, data elements, domains, and more.
  ABAP Development: Understanding how to define and use data types in ABAP is crucial for effective programming and integration within SAP systems.
  Transaction Codes:
  
  SE11: Data Dictionary maintenance.
  SE80: Object Navigator for ABAP development.
  SE37: Function Module maintenance, if you are working with function modules that may involve complex types.
  
  
  
  By following these steps and understanding the context of the error, you should be able to resolve the AXT_GEN204 error effectively.