How To Fix E2351 - Parameter assignment is not unique (check proposal)

SAP Error Message - Details

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 351

• Message text: Parameter assignment is not unique (check proposal)

What causes this issue?

This message can occur in any of the following three cases:
You want to <DS:TX.DDDOK_SHLP_TBSH>link</> a search help to a field of
a structure or table.
You want to link a search help to a table.
You want to <DS:TX.DDDOK_SHLP_INCLUDE>include</> a search help in a
collective search help.
To define how values are passed between the screen and the search help,
you must assign the <DS:TX.DDDOK_SHLP_PARAMETER>interface parameters</>
of the search help to the fields of the structure (in 1), the key
fields of the table (in 2) or the parameters of the colletive search
help (in 3).
The system tries to create a proposed assignment on the basis of
parameters that share the same domains. In this case, there is more
than one proposed assignment.

System Response

The system chooses one of the proposals.

How to fix this error?

Check the proposal. You may need to change the assignment.

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 E2351 - Parameter assignment is not unique (check proposal) ?

  The SAP error message E2351, which states "Parameter assignment is not unique (check proposal)," typically occurs in the context of ABAP programming or when dealing with function modules, methods, or other callable objects in SAP. This error indicates that there is ambiguity in the parameter assignment, meaning that the system cannot determine which parameter should be assigned to which value due to multiple possible matches.
  Causes:
  
  Ambiguous Parameter Names: If there are multiple parameters with the same name in the function module or method, the system may not be able to determine which one to use.
  Incorrect Parameter Mapping: When calling a function module or method, if the parameters are not correctly mapped or if there are multiple parameters that could match the provided values, this error can occur.
  Overloaded Methods: In cases where methods are overloaded (i.e., multiple methods with the same name but different parameters), the system may not be able to resolve which method to call based on the provided parameters.
  Dynamic Calls: If parameters are being assigned dynamically (e.g., using CALL FUNCTION with a variable), the system may not be able to resolve the correct parameter assignment.
  
  Solutions:
  
  Check Parameter Names: Ensure that all parameter names are unique within the context of the function module or method being called. If there are duplicates, consider renaming them or using more specific names.
  Explicit Parameter Assignment: When calling a function module or method, use explicit parameter assignment (e.g., PARAMETER_NAME = value) instead of relying on positional parameters. This helps the system understand which value corresponds to which parameter.
  Review Overloaded Methods: If using overloaded methods, ensure that the correct method signature is being used and that the parameters match the expected types and names.
  Debugging: Use the debugger to step through the code and check the values being passed to the function/module. This can help identify where the ambiguity arises.
  Documentation: Refer to the documentation of the function module or method to understand the expected parameters and their types.
  
  Related Information:
  
  Function Module Documentation: Check the SAP documentation for the specific function module or method you are using to understand its parameters and expected usage.
  ABAP Development Guidelines: Follow best practices for ABAP development, including naming conventions and parameter handling, to avoid such issues.
  SAP Community: Engage with the SAP community forums or support channels for additional insights and solutions from other developers who may have encountered similar issues.
  
  By addressing the ambiguity in parameter assignments and ensuring clear and explicit mappings, you can resolve the E2351 error effectively.