How To Fix S03116 - Error during RFC call; cannot convert parameters on all instances

SAP Error Message - Details

• Message type: E = Error

• Message class: S03 - Messages for Enjoy TCC Monitors, July 20, 1999

• Message number: 116

• Message text: Error during RFC call; cannot convert parameters on all instances

What causes this issue?

You can change online parameters in the workload monitor during the
runtime. This change failed due to an error during the RFC call of one
or more instances. The connection could not be created. It is possible
that an instance is currently inactive. In this case, it is not
possible to create a connection.

System Response

How to fix this error?

Repeat the action. Check that all instances are active. If the error
persits, check the RFC connection to the affected instance using
transaction <DS:TRAN.SM59>SM59</> (Display and Maintenance of RFC
Connections).

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 S03116 - Error during RFC call; cannot convert parameters on all instances ?

  The SAP error message S03116, which indicates "Error during RFC call; cannot convert parameters," typically arises during Remote Function Call (RFC) operations when there is a mismatch in the data types or structures of the parameters being passed between the systems. This can occur in various scenarios, such as when calling a function module or when using RFC-enabled function modules.
  Causes:
  
  Data Type Mismatch: The parameters being passed do not match the expected data types in the function module. For example, passing a string where an integer is expected.
  Structure Changes: If the structure of the data being sent has changed (e.g., fields added or removed) and the calling program has not been updated accordingly.
  Version Incompatibility: Different versions of the SAP systems involved may have different definitions for the function modules or data structures.
  Encoding Issues: Problems with character encoding can also lead to conversion errors, especially when dealing with non-ASCII characters.
  Missing Parameters: If required parameters are not being passed or are null when they should not be.
  
  Solutions:
  
  Check Data Types: Verify that the data types of the parameters being passed match the expected types in the function module. Use transaction SE37 to check the function module definition.
  Update Structures: If there have been changes to the structures, ensure that all calling programs are updated to reflect these changes.
  Check RFC Destination: Ensure that the RFC destination is correctly configured and points to the correct system version.
  Debugging: Use transaction ST22 to check for dumps related to the error. You can also use transaction SM21 to check the system log for any related messages.
  Test RFC Calls: Use transaction SE37 to test the RFC call directly and see if it works as expected. This can help isolate whether the issue is with the calling program or the function module itself.
  Check for Null Values: Ensure that all required parameters are being passed and that they are not null unless explicitly allowed.
  
  Related Information:
  
  
  Transaction Codes:
  
  SE37: Function Module Maintenance
  ST22: Dump Analysis
  SM21: System Log
  SE80: Object Navigator (for checking related programs)
  
  
  
  SAP Notes: Check SAP Notes for any known issues related to the specific function module or RFC calls. You can search for relevant notes in the SAP Support Portal.
  
  
  Documentation: Review the documentation for the specific function module to understand the expected parameters and their types.
  
  
  By following these steps, you should be able to identify and resolve the cause of the S03116 error in your SAP system.