How To Fix CPOC124 - Parameter &1: Enter a valid formal parameter type

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 124

• Message text: Parameter &1: Enter a valid formal parameter type

What causes this issue?

A dynamic function call has been defined in the process instruction.
This function call does not work correctly for one of the following
reasons:
An invalid data type, such as structures or table types, has been used
for the parameter.
The data type defined in parameter &V1& of function module &V2& could
not be found.

System Response

The system automatically uses type C (character), which is defined as
the standard type.

How to fix this error?

<ZH>In case 1:</>
RESET N1
To prevent the error, proceed as follows:
a) Check the data type of parameter &V1& in the <DS:TRAN.SE37>Function
Builder</>.
You can use the following data types:
<ZH>In import, export, and changing parameters</>
No type
Data elements
Basic ABAP types
Reference to structure fields / DB fields
<ZH>In table parameters</>
No type
Reference to structure fields / DB fields

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

b) Check in the <DS:TRAN.SE37>Function Builder</> whether parameter
&V1&is <LS>mandatory</> or <LS>optional</>.
If the parameter is <LS>optional</>, do NOT assign it to the process
instruction.
If the parameter is <LS>mandatory</>, you CANNOT use the function
module.
<ZH>In case 2:</>
INCLUDE NA_SYSVERW OBJECT DOKU ID TX LANGUAGE EN
<ZH>Note to system administration</>
Check and, if necessary, correct the data type of formal parameter &V1&
in function module &V2& in the <DS:TRAS.SE37>Function Builder</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CPOC124 - Parameter &1: Enter a valid formal parameter type ?

  The SAP error message CPOC124, which states "Parameter &1: Enter a valid formal parameter type," typically occurs in the context of ABAP programming or when working with function modules, methods, or procedures in SAP. This error indicates that an invalid parameter type has been specified for a formal parameter in a function or method definition.
  Cause:
  The error can be caused by several factors:
  
  Invalid Parameter Type: The parameter type specified does not match any of the valid types recognized by SAP. This could be due to a typo or using a type that is not defined in the system.
  Incorrect Declaration: The parameter may not be declared correctly in the function module or method signature.
  Incompatibility: The parameter type may not be compatible with the expected type in the calling program or function.
  
  Solution:
  To resolve the CPOC124 error, you can take the following steps:
  
  
  Check Parameter Declaration:
  
  Review the function module or method definition where the error occurs. Ensure that all parameters are declared with valid types.
  Common valid types include basic data types (e.g., CHAR, NUMC, INT4, etc.), structured types, table types, and reference types.
  
  
  
  Correct Typographical Errors:
  
  Look for any typographical errors in the parameter type declaration. Ensure that the type names are spelled correctly and match the expected types.
  
  
  
  Use Valid Types:
  
  If you are using custom types, ensure that they are defined correctly in the Data Dictionary (SE11) and are accessible in the context where you are using them.
  
  
  
  Check Calling Program:
  
  If the error occurs when calling a function module or method, verify that the parameters being passed match the expected types in the function/module signature.
  
  
  
  Refer to Documentation:
  
  Consult the SAP documentation or the ABAP programming guidelines for a list of valid parameter types and their usage.
  
  
  
  Debugging:
  
  If the issue persists, consider using the debugger to step through the code and identify where the invalid parameter type is being set or passed.
  
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE37 (Function Module) or SE80 (Object Navigator) to inspect and modify function modules or methods.
  ABAP Documentation: Familiarize yourself with the ABAP programming language and its data types by referring to the official SAP Help Portal or ABAP documentation.
  SAP Community: Engage with the SAP Community forums for additional insights and solutions from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to identify and correct the cause of the CPOC124 error in your SAP environment.