How To Fix >6521 - Incorrect buffer type &1; &2 is required

SAP Error Message - Details

• Message type: E = Error

• Message class: >6 - Purchasing Document

• Message number: 521

• Message text: Incorrect buffer type &1; &2 is required

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message >6521 - Incorrect buffer type &1; &2 is required ?

  The SAP error message 6521 indicates that there is an issue with the buffer type being used in a particular operation. The message typically states: "Incorrect buffer type &1; &2 is required," where &1 represents the buffer type that was provided, and &2 indicates the expected buffer type.
  Cause:
  This error usually occurs in the context of data processing where the system expects a specific type of buffer (e.g., a certain structure or format) but receives a different one. Common scenarios include:
  
  Data Type Mismatch: The program or function module is expecting a certain data structure or type but receives a different one.
  Incorrect Function Module Call: A function module is called with parameters that do not match the expected types.
  Configuration Issues: There may be configuration settings that are not aligned with the expected data types.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Function Module/Method: Review the documentation for the function module or method being called to ensure that you are passing the correct buffer type. Make sure that the parameters match the expected types.
  
  
  Debugging: Use the SAP debugger to trace the execution of the program. Check the values and types of the variables being passed to the function/module that is generating the error.
  
  
  Data Structure Verification: Ensure that the data structures being used are correctly defined and match the expected types. If you are using custom structures, verify that they are defined correctly in the ABAP Dictionary.
  
  
  Review Code Changes: If this error started occurring after recent changes to the code, review those changes to identify any potential issues with data types or buffer handling.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant notes or patches that may address this specific error message.
  
  
  Testing: After making changes, test the functionality thoroughly to ensure that the error is resolved and that no new issues have been introduced.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the specific function module or method you are working with to understand the expected input and output parameters.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  ABAP Development Guidelines: Familiarize yourself with best practices in ABAP development to avoid common pitfalls related to data types and structures.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.