How To Fix CPOC126 - Parameter &1: Actual parameter type different from formal parameter type

SAP Error Message - Details

• Message type: E = Error

• Message class: CPOC - PP-PI-PMA: Process Operator Cockpit Messages

• Message number: 126

• Message text: Parameter &1: Actual parameter type different from formal parameter type

What causes this issue?

A dynamic function call has beend defined in the process instruction.
The data type of the parameter for function module &V2& specified in
the process instruction (actual parameter) must be the same as that of
the corresponding parameter in the Function Builder (formal parameter).
In this process instruction, however, actual parameter &V1& is not the
same as the formal parameter. The system may not be able to execute the
function call or the program may terminate.

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

System Response

How to fix this error?

Check in the <DS:TRAN.SE37>Function Builder</> which data type is used
for parameter &V1& for function module &V2&.
Correct the data type of actual parameter &V1& in the process
instruction accordingly.

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 CPOC126 - Parameter &1: Actual parameter type different from formal parameter type ?

  The SAP error message CPOC126 indicates that there is a mismatch between the actual parameter type and the formal parameter type in a function module or method call. This typically occurs when the data type of the variable being passed to a function does not match the expected data type defined in the function's interface.
  Cause:
  
  Data Type Mismatch: The most common cause is that the variable you are passing to the function has a different data type than what the function expects. For example, you might be passing a character string when the function expects a numeric value.
  Incorrect Structure: If you are passing a structure or table, the fields may not match the expected types in the function definition.
  Parameter Length: Sometimes, the length of the parameter might also cause issues, especially if the function expects a specific length for a string or a specific range for a numeric value.
  
  Solution:
  
  Check Function Module/Method Definition: Review the definition of the function module or method you are calling. Check the expected parameter types and ensure that the variables you are passing match these types.
  Data Type Conversion: If there is a mismatch, you may need to convert the data type of the variable you are passing. For example, you can use CONCATENATE, VALUE, or other conversion functions to ensure the types match.
  Adjust Structure/Table: If you are passing a structure or table, ensure that the fields are defined correctly and match the expected types in the function interface.
  Debugging: Use the debugger to inspect the values and types of the parameters being passed at runtime. This can help identify where the mismatch is occurring.
  
  Related Information:
  
  Function Module Documentation: Always refer to the SAP documentation for the specific function module or method to understand the expected parameter types.
  ABAP Data Types: Familiarize yourself with ABAP data types and their characteristics to avoid such issues in the future.
  Error Handling: Implement error handling in your code to catch such issues early and provide meaningful error messages to users.
  
  By following these steps, you should be able to resolve the CPOC126 error and ensure that your function calls are made with the correct parameter types.