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.