How To Fix SY153 - Error when setting header line

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 153

• Message text: Error when setting header line

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SY153 - Error when setting header line ?

  The SAP error message SY153, which states "Error when setting header line," typically occurs in ABAP programming when there is an issue with the way a header line is being manipulated in a table or internal table. This error can arise due to various reasons, such as incorrect data types, issues with the structure of the internal table, or problems with the way the header line is being accessed or modified.
  Causes of SY153 Error
  
  
  Incorrect Declaration: The header line for an internal table may not be declared properly. If the internal table is defined without a header line, or if the header line is not compatible with the structure of the internal table, this error can occur.
  
  
  Data Type Mismatch: If there is a mismatch between the data types of the header line and the internal table, it can lead to this error.
  
  
  Accessing Non-Existent Header Line: Attempting to access or modify a header line that has not been initialized or does not exist can trigger this error.
  
  
  Improper Use of APPEND or INSERT: If you are trying to append or insert data into an internal table without properly managing the header line, it can lead to this error.
  
  
  Solutions to SY153 Error
  
  
  Check Declaration: Ensure that the internal table is declared with a header line if you intend to use one. For example:
  DATA: BEGIN OF itab OCCURS 0,
          field1 TYPE c LENGTH 10,
          field2 TYPE i,
        END OF itab.
  Alternatively, if you are using a modern approach, consider using a structure without a header line:
  DATA: itab TYPE TABLE OF your_structure.
  
  
  Verify Data Types: Make sure that the data types of the header line and the internal table are compatible. If you are using a structure, ensure that the fields match in type and length.
  
  
  Initialize Header Line: Before accessing or modifying the header line, ensure it is initialized. You can do this by using:
  CLEAR itab.
  
  
  Use APPEND or INSERT Correctly: When adding entries to the internal table, ensure you are using the correct syntax. For example:
  itab-field1 = 'Value'.
  itab-field2 = 123.
  APPEND itab.
  
  
  Debugging: If the error persists, use the ABAP debugger to step through the code and identify where the error occurs. Check the values and states of the internal table and header line at runtime.
  
  
  Related Information
  
  ABAP Documentation: Refer to the official SAP documentation for more details on internal tables and header lines.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other developers who may have encountered similar issues.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  
  By following these guidelines, you should be able to identify and resolve the SY153 error in your ABAP programs.