How To Fix UPC202 - Error while calling up RFC

UPC202 - Overview

• Message type: E = Error

• Message class: UPC - Planning: General Error Messages

• Message number: 202

• Message text: Error while calling up RFC

What causes this issue?

You have selected a function, to execute this the system must set up an
RFC connection to another SAP System. However, setting up this
connection was not successful. The following internal error message was
generated:
"&V1& &V2&"

System Response

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

How to fix this error?

Inform the system administrator.

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 UPC202 - Error while calling up RFC ?

  The SAP error message UPC202, which indicates "Error while calling up RFC," typically occurs when there is an issue with Remote Function Call (RFC) communication between systems. This can happen in various scenarios, such as when trying to execute a function module remotely or when there are issues with the configuration of the RFC destination.
  Causes of UPC202 Error
  
  Network Issues: Problems with the network connection between the SAP systems can lead to RFC errors.
  RFC Destination Configuration: Incorrect configuration of the RFC destination in transaction SM59 can cause this error. This includes incorrect connection parameters, such as the target system's IP address, port, or user credentials.
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations to execute the function module.
  Function Module Issues: The function module being called may not exist, may be inactive, or may have been changed in a way that is incompatible with the