How To Fix OT603 - Error during remote function call

OT603 - Overview

• Message type: E = Error

• Message class: OT - SAP Online Correction Support (SOCS)

• Message number: 603

• Message text: Error during remote function call

What causes this issue?

An error occurred during the execution of the RFC module.
Return code .......: &V1&
Destination .......: &V2&
Module ............: &V3&
Meaning of the return code:
03 System error
04 Communication error
Possible causes:
03 No authorization to log on to destination system
04 Timeout while establishing the connection
(does the partner exist?)

System Response

Processing was cancelled.

How to fix this error?

Please inform your system adminstrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OT603 - Error during remote function call ?

  The SAP error message OT603, which indicates "Error during remote function call," typically occurs when there is a problem with the communication between SAP systems or between an SAP system and an external system. This error can arise due to various reasons, including network issues, configuration problems, or issues with the remote function call (RFC) destination.
  Causes of OT603 Error
  
  
  Network Issues: Problems with the network connection between the systems can lead to this error. This includes issues like firewalls blocking the connection, network outages, or incorrect routing.
  
  
  RFC Destination Configuration: The RFC destination may not be configured correctly. This includes incorrect settings for the target system, such as the system ID, client number, user credentials, or connection type.
  
  
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations to execute the function module or access the required data.
  
  
  System Availability: The target system may be down or not