How To Fix /STTPEC/MSG203 - RFC communication error

SAP Error Message - Details

• Message type: E = Error

• Message class: /STTPEC/MSG -

• Message number: 203

• Message text: RFC communication error

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /STTPEC/MSG203 - RFC communication error ?

  The SAP error message /STTPEC/MSG203 RFC communication error typically indicates an issue with Remote Function Call (RFC) 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 authorization issues.
  Causes:
  
  
  Network Issues: Problems with the network connection between the systems can lead to RFC communication errors. This could be due to firewalls, routing issues, or network outages.
  
  
  Configuration Errors: Incorrect configuration of the RFC destination in the SAP system can cause communication failures. This includes incorrect settings in transaction SM59.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to perform the requested operation.
  
  
  System Availability: The target system may be down or not reachable, leading to communication errors.
  
  
  Timeouts: If the RFC call takes too long to respond, it may time out, resulting in an error.
  
  
  Version Compatibility: Incompatibility between different versions of SAP systems can also lead to RFC communication issues.
  
  
  Solutions:
  
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the systems. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Verify RFC Destination: Go to transaction SM59 and check the configuration of the RFC destination. Ensure that the connection parameters (like target host, system number, client, user, and password) are correct.
  
  
  Test RFC Connection: In transaction SM59, you can test the RFC connection to see if it is working properly. This will help identify if the issue is with the connection itself.
  
  
  Check Authorizations: Ensure that the user used for the RFC connection has the necessary authorizations to execute the required functions.
  
  
  Review System Logs: Check the system logs (transaction SM21) and the developer trace files (transaction ST11) for any additional error messages that might provide more context about the issue.
  
  
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the RFC destination configuration.
  
  
  Check System Status: Ensure that the target system is up and running and that the relevant services are active.
  
  
  Consult SAP Notes: Look for any relevant SAP Notes that might address known issues related to RFC communication errors.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  ST11: Developer Traces
  
  
  
  SAP Notes: Search the SAP Support Portal for notes related to RFC communication errors for specific guidance and patches.
  
  
  Documentation: Review SAP documentation on RFC communication for best practices and troubleshooting steps.
  
  
  If the issue persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance.