How To Fix TPDA813 - The data types are not compatible for a comparison

SAP Error Message - Details

• Message type: E = Error

• Message class: TPDA - Debugger

• Message number: 813

• Message text: The data types are not compatible for a comparison

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message TPDA813 - The data types are not compatible for a comparison ?

  The SAP error message TPDA813 indicates that there is a type mismatch in a comparison operation within your ABAP code or in a data processing scenario. This typically occurs when you are trying to compare two variables or fields that are of different data types, which is not allowed in ABAP.
  Cause:
  
  Data Type Mismatch: The most common cause is that you are trying to compare two variables that have incompatible data types. For example, comparing a character string with a numeric value.
  Field Length Issues: Sometimes, even if the data types are the same, differences in field lengths can cause this error.
  Implicit Conversions: ABAP does not always perform implicit type conversions, so if you are comparing different types, you may encounter this error.
  
  Solution:
  
  Check Data Types: Review the data types of the variables or fields involved in the comparison. Ensure that they are compatible. You can use the ABAP Data Dictionary (SE11) to check the definitions of the fields.
  Explicit Conversion: If the data types are different but you need to compare them, you can use explicit conversion functions. For example:
  
  Use CONCATENATE to convert numbers to strings.
  Use CAST or CONVERT functions to convert between types.
  
  
  Adjust Field Lengths: If the issue is related to field lengths, ensure that the lengths of the fields being compared are compatible.
  Debugging: Use the ABAP debugger to step through the code and identify the exact line where the error occurs. This can help you pinpoint the variables involved in the comparison.
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the different data types in ABAP, such as CHAR, NUMC, INT, FLOAT, etc.
  Type Conversion Functions: Learn about ABAP functions for type conversion, such as CONVERT_TO_STRING, CONVERT_TO_INTEGER, etc.
  Documentation: Refer to the SAP Help Portal or the ABAP documentation for more details on data types and comparisons.
  
  By addressing the data type compatibility issue, you should be able to resolve the TPDA813 error.