How To Fix FB764 - EXCEPTION: Too_small for STRING_CONCATENATE

SAP Error Message - Details

• Message type: E = Error

• Message class: FB - Batch Programs

• Message number: 764

• Message text: EXCEPTION: Too_small for STRING_CONCATENATE

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FB764 - EXCEPTION: Too_small for STRING_CONCATENATE ?

  The SAP error message FB764, which states "EXCEPTION: Too_small for STRING_CONCATENATE," typically occurs when there is an attempt to concatenate strings in ABAP (Advanced Business Application Programming) and the target string is not large enough to hold the resulting concatenated value. This can happen in various scenarios, such as when manipulating strings in reports, function modules, or other ABAP programs.
  Cause:
  
  Insufficient Length: The target string variable has not been defined with a sufficient length to accommodate the concatenated result.
  Dynamic Length Calculation: If the length of the strings being concatenated is not properly calculated or if the target string is defined with a fixed length that is too small.
  Data Type Mismatch: Using incompatible data types for concatenation can also lead to this error.
  
  Solution:
  
  
  Increase the Length of the Target String: Ensure that the target string variable is defined with a length that is large enough to hold the concatenated result. For example:
  DATA: lv_target TYPE string.
  If you are using a fixed-length character type, ensure it is sufficiently large:
  DATA: lv_target TYPE c LENGTH 255.  " Adjust length as needed
  
  
  Use STRING_CONCATENATE Properly: If you are using the STRING_CONCATENATE function, ensure that the target string is initialized and has enough space. You can also use the CONCATENATE statement, which automatically handles the length:
  CONCATENATE string1 string2 INTO lv_target.
  
  
  Check for NULL or Empty Values: Ensure that the strings being concatenated are not null or empty, as this can sometimes lead to unexpected behavior.
  
  
  Debugging: If the error persists, use debugging tools to check the lengths of the strings involved in the concatenation at runtime. This can help identify which specific string is causing the issue.
  
  
  Related Information:
  
  ABAP Documentation: Review the official SAP documentation for string handling and concatenation in ABAP.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the FB764 error and successfully concatenate strings in your ABAP programs.