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

XC120 - Overview

• 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)