How To Fix ON001 - Internal error in &1/&2: &3 &4

SAP Error Message - Details

• Message type: E = Error

• Message class: ON - Tools in area Object Modeler / Object Editor

• Message number: 001

• Message text: Internal error in &1/&2: &3 &4

What causes this issue?

The current program has recognised an internal error. This is a
situation that should not occur. The program is ending to guarantee
data integrity.
The error occurred in '&V1&' / '&V2&'.
The cause of the error was '&V3&' / '&V4&'.

System Response

How to fix this error?

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 ON001 - Internal error in &1/&2: &3 &4 ?

  The SAP error message ON001, which states "Internal error in &1/&2: &3 &4," is a generic error message indicating that an internal error has occurred in the SAP system. The placeholders (&1, &2, &3, &4) will be replaced with specific information related to the error, such as the program name, transaction code, or other relevant details.
  Causes:
  
  Programmatic Issues: There may be a bug or issue in the ABAP code or program that is being executed.
  Data Inconsistencies: Corrupted or inconsistent data in the database can lead to unexpected behavior.
  Configuration Errors: Incorrect configuration settings in the system can trigger internal errors.
  System Resource Issues: Insufficient memory or other system resources can cause internal errors.
  Version Compatibility: Issues arising from using incompatible versions of SAP components or add-ons.
  
  Solutions:
  
  Check SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that address the specific error message. SAP frequently releases notes that provide fixes or workarounds for known issues.
  Debugging: If you have access to the ABAP debugger, you can try to debug the program to identify the exact point of failure.
  Data Consistency Check: Run consistency checks on the relevant data to ensure there are no corrupt entries.
  Review Configuration: Check the configuration settings related to the transaction or program that triggered the error.
  System Logs: Review the system logs (transaction SM21) for any additional error messages or warnings that may provide more context.
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP Support for assistance. Provide them with the full error message and any relevant details.
  
  Related Information:
  
  Transaction Codes: Depending on the context of the error, you may want to check specific transaction codes related to the functionality you were using when the error occurred.
  System Performance: Monitor system performance metrics to ensure that there are no underlying resource issues.
  User Authorizations: Ensure that the user executing the transaction has the necessary authorizations, as lack of permissions can sometimes lead to unexpected errors.
  
  Conclusion:
  The ON001 error is a generic internal error, and resolving it typically requires a combination of checking SAP Notes, debugging, and reviewing system configurations and logs. If you are unable to resolve the issue, contacting SAP Support with detailed information will be the best course of action.