How To Fix XC120 - Internal error during conversion of CUOBJ in GUID

SAP Error Message - Details

• Message type: E = Error

• Message class: XC - Message Class for Core Interface

• Message number: 120

• Message text: Internal error during conversion of CUOBJ in GUID

What causes this issue?

An unexpected situation has arisen during the conversion of a CUOBJ to
an external display of a configuration or vice versa. The external
display is called &V1&.

System Response

Conversion cannot be performed.

How to fix this error?

The situation can be attributed either to a program error or to an
inconsistency in the database table IBEXTINST. Inform your system
administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message XC120 - Internal error during conversion of CUOBJ in GUID ?

  The SAP error message XC120, which indicates an "Internal error during conversion of CUOBJ in GUID," typically arises during operations involving the conversion of a Custom Object (CUOBJ) to a Global Unique Identifier (GUID). This error can occur in various contexts, such as during data migration, system upgrades, or when working with custom developments.
  Causes:
  
  Data Inconsistency: There may be inconsistencies in the data being processed, such as missing or corrupted entries in the database.
  Custom Development Issues: If there are custom programs or enhancements that manipulate CUOBJ or GUIDs, they may contain bugs or logic errors.
  System Configuration: Incorrect configuration settings in the SAP system can lead to issues during the conversion process.
  Transport Issues: Problems with transport requests that involve CUOBJ can also trigger this error.
  Version Compatibility: If the system has been upgraded or patched, there may be compatibility issues with existing custom objects.
  
  Solutions:
  
  Check Data Consistency: Use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to check the relevant tables for inconsistencies. Ensure that all required entries are present and valid.
  Review Custom Code: If the error occurs in a custom program, review the code for any potential issues. Debugging the program may help identify the root cause.
  System Logs: Check the system logs (transaction SM21) for any additional error messages or warnings that could provide more context about the issue.
  Transport Management: If the error is related to transport requests, ensure that all necessary objects are included in the transport and that they are correctly imported into the target system.
  SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates available that resolve the issue.
  Consult SAP Support: If the issue persists and cannot be resolved through the above steps, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including any relevant logs and the context in which it occurs.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11, SE16, SM21, and SE80 for debugging and analyzing the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review SAP documentation related to CUOBJ and GUID handling, especially if you are working with specific modules or custom developments.
  
  By following these steps, you should be able to diagnose and potentially resolve the XC120 error in your SAP environment.