How To Fix CNV_PE_POST404 - Simulation failed; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_POST -

• Message number: 404

• Message text: Simulation failed; see long text

What causes this issue?

An error occurred during the simulation of the worklist item. Therefore
calling the simulation function module ended with sy-subrc &V3&.

System Response

Error message: &V1&&V2&
Worklist item: &V4&

How to fix this error?

Correct the error and rebuild the transfer list for the worklist item.
In case of a runtime error you may also check transaction
<DS:TRAN.ST22>ST22</> in the corresponding remote system.

Procedure for System Administrators

Sy-subrc,,Meaning
91,,Error message
92,,Communication failure
99,,System failure

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_POST404 - Simulation failed; see long text ?

  The SAP error message "CNV_PE_POST404 Simulation failed; see long text" typically occurs during the execution of a data migration or conversion process, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there was a failure during the simulation phase of the data migration process.
  Causes:
  
  Data Validation Issues: The data being migrated may not meet the required validation rules or constraints defined in the target system.
  Configuration Errors: There may be incorrect or incomplete configuration settings in the migration cockpit or the source/target systems.
  Mapping Issues: The mapping of fields between the source and target systems may not be correctly defined, leading to data incompatibility.
  Missing Required Fields: Some required fields in the target system may not have corresponding values in the source data.
  Technical Errors: There could be underlying technical issues, such as database connectivity problems or system resource limitations.
  
  Solutions:
  
  Check Long Text: The first step is to check the long text associated with the error message for more specific details about the failure. This can provide insights into what went wrong.
  Data Review: Review the data being migrated for any inconsistencies, missing values, or violations of data integrity rules.
  Configuration Check: Ensure that all necessary configurations in the migration cockpit and the source/target systems are correctly set up.
  Field Mapping: Verify the field mapping between the source and target systems to ensure that all fields are correctly aligned and that there are no missing mappings.
  Run in Test Mode: If possible, run the migration in a test mode to identify specific records that are causing the failure.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any known issues or additional troubleshooting steps.
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance, providing them with the error details and any relevant logs.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues with the migration process or provide patches.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit for best practices and troubleshooting tips.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to successfully complete the data migration process.