How To Fix R8156 - Secondary segment &1; invalid internal data type '&2' (use type 'h')

SAP Error Message - Details

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 156

• Message text: Secondary segment &1; invalid internal data type '&2' (use type 'h')

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message R8156 - Secondary segment &1; invalid internal data type '&2' (use type 'h') ?

  The SAP error message R8156 indicates that there is an issue with the internal data type of a secondary segment in a data structure. Specifically, it suggests that the internal data type being used is invalid and that the expected type should be 'h' (which typically refers to a hexadecimal type).
  Cause:
  The error can occur due to several reasons:
  
  Incorrect Data Type: The secondary segment is defined with an incorrect data type that does not match the expected type.
  Data Structure Definition: There may be an issue in the definition of the data structure or the way the secondary segment is being used in the program.
  Program Logic: The logic in the ABAP program may be attempting to process data in a way that is incompatible with the defined data types.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Data Type Definitions:
  
  Review the data structure definitions in your ABAP program. Ensure that the secondary segment is defined with the correct data type. If it should be of type 'h', make sure it is explicitly defined as such.
  
  
  
  Modify the Program Logic:
  
  If the program logic is manipulating the data incorrectly, adjust the logic to ensure that it adheres to the expected data types. This may involve changing how data is assigned or processed.
  
  
  
  Debugging:
  
  Use the ABAP debugger to trace the execution of the program and identify where the invalid data type is being introduced. This can help pinpoint the exact location of the issue.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for guidance on the specific data types and structures being used. This can provide insights into the correct usage and definitions.
  
  
  
  Testing:
  
  After making changes, thoroughly test the program to ensure that the error is resolved and that no new issues have been introduced.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, SAP releases updates that address specific bugs or issues.
  ABAP Data Types: Familiarize yourself with ABAP data types and their appropriate usage. Understanding the differences between types can help prevent similar errors in the future.
  Community Forums: Engage with SAP community forums or support channels where other developers may have encountered similar issues. They can provide additional insights or solutions.
  
  By following these steps, you should be able to identify and resolve the cause of the R8156 error in your SAP environment.