How To Fix CNV_PE_GEN158 - Parameter &2-&1 is not accessible and cannot be moved

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_GEN - Messages for object generation

• Message number: 158

• Message text: Parameter &2-&1 is not accessible and cannot be moved

What causes this issue?

The parameter &V1& belongs to a table &V2&. There is no direct access to
the table &V2& from the sender table &V3& (defined in Structural
Configuration for the current receiver parameter) due to one of the
following reasons:
Table &V2& and table &V3& have the same level in the data model
hierarchy.
Table &V2& has a deeper level than table &V3& in the data model
hierarchy.
Table &V2& and table &V3& belong to different branches of the data model
hierarchy.
In this case the access path from the table &V3& to the table &V2& has
to be provided. This means that you have to define the relevant entry in
the table &V2& that will contain the value for parameter &V1& at
runtime.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_GEN158 - Parameter &2-&1 is not accessible and cannot be moved ?

  The SAP error message CNV_PE_GEN158, which states "Parameter &2-&1 is not accessible and cannot be moved," typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that a specific parameter or field is not accessible, which prevents the system from moving or processing the data as intended.
  Causes:
  
  Authorization Issues: The user executing the migration may not have the necessary authorizations to access the specified parameter or field.
  Configuration Errors: The parameter may not be properly configured in the system, leading to accessibility issues.
  Data Model Changes: If there have been changes in the data model (e.g., during an upgrade or migration), certain parameters may no longer exist or may have been renamed.
  Technical Issues: There could be underlying technical issues, such as database inconsistencies or missing objects.
  
  Solutions:
  
  Check Authorizations: Ensure that the user has the necessary authorizations to access the parameter. This may involve checking roles and permissions in the SAP system.
  Review Configuration: Verify the configuration settings related to the parameter. Ensure that it is correctly set up and accessible in the system.
  Data Model Verification: If the error occurred after an upgrade or migration, check the data model to ensure that the parameter still exists and is correctly defined.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration or conversion process you are performing. There may be specific instructions or prerequisites that need to be followed.
  Debugging: If you have access to technical resources, consider debugging the process to identify the exact point of failure and gather more information about the parameter in question.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with the error message details and any relevant context to help them diagnose the issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on similar issues.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for data migration.
  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 cause of the CNV_PE_GEN158 error and implement a suitable solution.