How To Fix WTY106 - Unable to generate field catalog

SAP Error Message - Details

• Message type: E = Error

• Message class: WTY - Warranty processing

• Message number: 106

• Message text: Unable to generate field catalog

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WTY106 - Unable to generate field catalog ?

  SAP Error Message:
  
  WTY106 - Unable to generate field catalog
  
  Cause:
  The error message WTY106 typically occurs when SAP is unable to generate the field catalog for a report or a function module that requires dynamic field catalog creation. This usually happens in the context of ALV (ABAP List Viewer) reports or when using function modules like REUSE_ALV_FIELDCATALOG_MERGE or similar.
  Common causes include:
  
  The internal table or structure passed to the ALV function module is not properly defined or is empty.
  The data reference or field catalog reference is incorrect or not properly initialized.
  The program is trying to generate a field catalog for a data object that does not exist or is not accessible.
  Missing or incorrect metadata for the data structure (e.g., no DDIC structure or table type assigned).
  Authorization issues or system inconsistencies (less common).
  
  
  Solution:
  To resolve the WTY106 error, consider the following steps:
  
  
  Check the Data Object:
  
  Ensure that the internal table or structure you are passing to the ALV function module is correctly declared and populated.
  The data object should be a well-defined DDIC structure or table type.
  
  
  
  Verify Field Catalog Generation Code:
  
  If you are using REUSE_ALV_FIELDCATALOG_MERGE, make sure the parameters are correctly passed.
  The table name or structure name passed to the function module must be valid and exist in the Data Dictionary.
  
  
  
  Initialize Field Catalog Properly:
  
  If you are creating the field catalog manually, ensure all required fields are filled correctly.
  If you rely on automatic generation, confirm that the data reference points to a valid data object.
  
  
  
  Check for Empty or Null Data:
  
  The internal table should not be empty or uninitialized when generating the field catalog.
  Populate the internal table with at least one row or ensure the structure is properly defined.
  
  
  
  Debugging:
  
  Use the ABAP debugger to check the values passed to the field catalog generation function.
  Check if the structure or table name is correct and accessible.
  
  
  
  Authorization and System Checks:
  
  Verify that the user has the necessary authorizations.
  Check for any system inconsistencies or transport issues that might affect DDIC objects.
  
  
  
  
  Related Information:
  
  
  Function Modules:
  
  REUSE_ALV_FIELDCATALOG_MERGE
  LVC_FIELDCATALOG_MERGE
  SALV_WD_TABLE=>GET_FIELDCATALOG
  
  
  
  Notes and Documentation:
  
  SAP Notes related to ALV field catalog issues.
  SAP Help on ALV Grid and field catalog generation.
  
  
  
  Typical Use Case:
  
  When creating ALV reports dynamically, the field catalog is essential to define columns, headers, and data types.
  Errors in field catalog generation prevent the ALV grid from displaying data properly.
  
  
  
  
  Summary:
  WTY106 - Unable to generate field catalog occurs when the system cannot create the metadata description of the data to be displayed, usually due to incorrect or missing data structure references. Verify the data object, ensure proper initialization, and check the parameters passed to the ALV field catalog generation function to fix the issue.