How To Fix DT634 - & (Conversion & -> transparent not possible)

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 634

• Message text: & (Conversion & -> transparent not possible)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT634 - & (Conversion & -> transparent not possible) ?

  The SAP error message DT634, which states "Conversion & -> transparent not possible," typically occurs during data type conversion in ABAP programs or when working with database tables. This error indicates that the system is unable to convert a certain data type into a transparent format, which is often required for database operations or data processing.
  Causes:
  
  Incompatible Data Types: The error usually arises when there is an attempt to convert a complex or non-transparent data type (like a structure or internal table) into a transparent data type (like a simple data type or a flat structure).
  Field Length Issues: If the field lengths of the source and target data types do not match or are incompatible, this can lead to conversion errors.
  Data Structure Changes: If there have been changes to the data structure in the database or in the ABAP program that are not reflected in the corresponding data types, this can cause conversion issues.
  Incorrect Use of Data Types: Using a data type that is not suitable for the operation being performed can also lead to this error.
  
  Solutions:
  
  Check Data Types: Review the data types involved in the conversion. Ensure that you are trying to convert compatible types. If you are converting a structure, ensure that the target is also a structure or a compatible type.
  Adjust Field Lengths: Make sure that the lengths of the fields in the source and target data types match. If necessary, adjust the lengths to ensure compatibility.
  Use Appropriate Conversion Functions: If you are performing a conversion, consider using appropriate ABAP functions or methods that handle the conversion correctly.
  Debugging: Use the ABAP debugger to trace the point of failure. This can help identify the exact data types and values being processed at the time of the error.
  Check for Changes: If there have been recent changes to the database schema or ABAP program, ensure that all references to data types are updated accordingly.
  Consult Documentation: Review SAP documentation or notes related to the specific data types you are working with for any known issues or additional guidance.
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the different ABAP data types and their characteristics. Understanding the differences between transparent and non-transparent types is crucial.
  SAP Notes: Check SAP Notes for any specific fixes or recommendations related to this error message. SAP frequently updates its knowledge base with solutions to common issues.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed. Other users may have encountered the same error and can provide insights or solutions.
  
  By following these steps, you should be able to diagnose and resolve the DT634 error in your SAP environment.