How To Fix CMPERS121 - Internal error: Conversion for screen &1 failed

SAP Error Message - Details

• Message type: E = Error

• Message class: CMPERS - Personalization for Web Applications

• Message number: 121

• Message text: Internal error: Conversion for screen &1 failed

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.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CMPERS121 - Internal error: Conversion for screen &1 failed ?

  The SAP error message CMPERS121, which states "Internal error: Conversion for screen &1 failed," typically indicates that there is an issue with the conversion of data for a specific screen in the SAP system. This error can arise from various underlying causes, and addressing it often requires a systematic approach.
  Possible Causes:
  
  Data Type Mismatch: The data being processed may not match the expected data type for the fields on the screen.
  Custom Code Issues: If there are custom enhancements or modifications in the code related to the screen, they may be causing the conversion to fail.
  Screen Configuration Errors: There may be issues with the configuration of the screen itself, such as incorrect field definitions or attributes.
  Missing or Corrupted Data: The data being processed may be missing or corrupted, leading to conversion failures.
  SAP Notes: There may be known issues related to specific versions of SAP that have been documented in SAP Notes.
  
  Solutions:
  
  Check Data Types: Review the data being passed to the screen and ensure that it matches the expected data types. This includes checking for null values or unexpected formats.
  Review Custom Code: If there are any custom enhancements or modifications, review the code for potential issues. Debugging the code may help identify where the conversion is failing.
  Screen Configuration: Verify the configuration of the screen in transaction SE80 or SE41. Ensure that all fields are correctly defined and that there are no inconsistencies.
  Data Validation: Validate the data being processed to ensure it is complete and in the correct format. This may involve checking database entries or input data.
  Check SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error. Applying a relevant note may resolve the issue.
  System Logs: Check the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  Contact SAP Support: If the issue persists and cannot be resolved through the above steps, consider reaching out to SAP Support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE80 (Object Navigator), SE41 (Menu Painter), and SM21 (System Log) for troubleshooting.
  Debugging: Use the ABAP debugger to step through the code and identify where the conversion is failing.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  
  By following these steps, you should be able to diagnose and potentially resolve the CMPERS121 error in your SAP system.