How To Fix CNV_PE_POST404 - Simulation failed; see long text

CNV_PE_POST404 - Overview

• 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.

CNV_PE_POST404 - Details

• 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