How To Fix CNV_PE788 - Access path for parameter &1 is required for this transformation

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 788

• Message text: Access path for parameter &1 is required for this transformation

What causes this issue?

You have used field of table &V1& in your transformation, although table
&V2& is assigned as (one of the) sender parameter(-s) to the transfer
method parameter &V3& in the Structure Configuration / Knowledge Base.
There is no 1:1 relation between table &V2& and table &V1& due to one of
the following reasons:
Table &V1& has the same or lower data model hierarchy level than table
&V2&
Table &V1& belongs to another data model hierarchy branch than table
&V2&.
In both cases several &V1& entries could correspond to the same &V2&
entry.
This transformation is not valid without further information. You need
to specify exactly &V1& which entry has to be used as a value source for
your transformation.

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?

Go to the Structure Configuration / Knowledge Base settings of the
transfer method parameter &V3& and provide required access path for
table &V1&

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_PE788 - Access path for parameter &1 is required for this transformation ?

  The SAP error message CNV_PE788 indicates that a required access path for a specific parameter is missing during a transformation process, typically in the context of data migration or conversion using SAP's tools like the SAP S/4HANA Migration Cockpit or other data transformation tools.
  Cause:
  The error occurs when the system expects a specific access path (like a database table or a view) to be defined for a parameter that is necessary for the transformation process. This can happen due to several reasons:
  
  Missing Configuration: The access path for the parameter has not been configured or defined in the system.
  Incorrect Mapping: The mapping of the source and target fields may not be correctly set up, leading to the system not being able to find the required access path.
  Data Model Changes: Changes in the underlying data model (like changes in tables or fields) that have not been reflected in the transformation settings.
  Authorization Issues: The user executing the transformation may not have the necessary authorizations to access the required data.
  
  Solution:
  To resolve the CNV_PE788 error, you can follow these steps:
  
  
  Check Configuration:
  
  Verify that the access path for the parameter is correctly configured in the transformation settings. This may involve checking the relevant customizing settings in the SAP system.
  
  
  
  Review Mapping:
  
  Ensure that the mapping of source and target fields is correctly defined. Check if the parameter in question is correctly mapped to the corresponding field in the target structure.
  
  
  
  Update Data Model:
  
  If there have been changes to the data model, ensure that the transformation settings are updated accordingly. This may involve adjusting the access paths or re-defining the transformation logic.
  
  
  
  Authorization Check:
  
  Confirm that the user executing the transformation has the necessary authorizations to access the required tables or views. You may need to consult with your SAP security team to ensure proper access rights.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation or notes related to the specific transformation process you are using. There may be specific guidelines or troubleshooting steps provided by SAP.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. Provide them with detailed information about the error, including the context in which it occurs.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions.
  Documentation: Review the official SAP documentation for the specific data migration or transformation tool you are using, as it may contain specific instructions or best practices.
  
  By following these steps, you should be able to identify and resolve the cause of the CNV_PE788 error in your SAP system.