How To Fix CNV_PE_GEN056 - Importing parameter &1 used in several TRules with different types

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_GEN - Messages for object generation

• Message number: 056

• Message text: Importing parameter &1 used in several TRules with different types

What causes this issue?

The decision transformation rule requires certain importing parameters.
These importing parameter are derived by the importing parameter of the
transformation rules of the RELV_IDENT entries.
The name of each importing parameter of a decision transformation rule
must be unique.
However, during the derivation of the required importing parameters of
the decision transformation rule the program found that the importing
parameter &V1& must be present with technical type &V2& and also with
technical type &V3&. This cannot be achieved.

System Response

Error

How to fix this error?

Check the transformation rules of the affected RELV_IDENT entries and
unify the importing parameter types.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_GEN056 - Importing parameter &1 used in several TRules with different types ?

  The SAP error message CNV_PE_GEN056 indicates that there is an issue with the importing parameter &1 being used in multiple Transformation Rules (TRules) with different data types. This typically occurs during data migration or transformation processes, particularly when using SAP's Data Migration tools or the SAP S/4HANA Migration Cockpit.
  Cause:
  The error arises when:
  
  The same importing parameter is defined in multiple TRules, but with different data types (e.g., one TRule might define it as a string while another defines it as an integer).
  This inconsistency can lead to confusion during the execution of the transformation rules, as the system cannot determine which data type to use for the parameter.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify the TRules: Check the TRules that are using the importing parameter &1. You can do this by reviewing the transformation rules in the relevant migration project.
  
  
  Standardize Data Types: Ensure that the importing parameter is consistently defined across all TRules. This means:
  
  If one TRule uses the parameter as a string, all other TRules should also use it as a string.
  If necessary, modify the TRules to ensure they all use the same data type for the parameter.
  
  
  
  Test the Changes: After making the necessary adjustments, test the transformation process again to ensure that the error is resolved.
  
  
  Documentation: Document the changes made to the TRules for future reference and to avoid similar issues in the future.
  
  
  Related Information:
  
  Migration Cockpit: If you are using the SAP S/4HANA Migration Cockpit, familiarize yourself with the data types and structures expected for each importing parameter.
  Transformation Rules: Review the documentation on how to create and manage TRules effectively to avoid conflicts in parameter definitions.
  SAP Notes: Check for any relevant SAP Notes or updates that might address this specific error or provide additional guidance.
  
  By following these steps, you should be able to resolve the CNV_PE_GEN056 error and ensure that your data migration process runs smoothly.