How To Fix TT202 - Destination & RFC error

SAP Error Message - Details

• Message type: E = Error

• Message class: TT - Extended Computer Aided Test Tool (eCATT) messages

• Message number: 202

• Message text: Destination & RFC 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 TT202 - Destination & RFC error ?

  The SAP error message TT202, which indicates a "Destination & RFC error," typically arises when there is an issue with the Remote Function Call (RFC) destination configuration or connectivity between SAP systems. This error can occur in various scenarios, such as when trying to execute remote function modules or when accessing external systems.
  Causes of TT202 Error
  
  
  Incorrect RFC Destination Configuration: The RFC destination may not be set up correctly in the SAP system. This includes incorrect parameters such as the target system's hostname, system number, client, user credentials, etc.
  
  
  Network Issues: There may be network connectivity problems between the SAP systems. This could be due to firewall settings, network outages, or incorrect routing.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to access the target system.
  
  
  Target System Down: The target SAP system may be down or not reachable due to maintenance or other issues.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured.
  
  
  Version Compatibility: There may be compatibility issues between different SAP versions or components.
  
  
  Solutions to TT202 Error
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 to check the configuration of the RFC destination.
  Ensure that the connection type (e.g., T, 3, etc.) is correct and that all parameters (like hostname, system number, client, user, and password) are correctly set.
  
  
  
  Test the RFC Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to verify if the connection is working.
  
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to check if the target system is reachable from the source system.
  Ensure that there are no firewall rules blocking the connection.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations in the target system.
  
  
  
  Check Target System Status:
  
  Verify that the target SAP system is up and running. You can check this by logging into the target system or checking with your system administrator.
  
  
  
  Review SAP Gateway Configuration:
  
  Ensure that the SAP Gateway is running and properly configured. You can check the status of the gateway using transaction SMGW.
  
  
  
  Check for SAP Notes:
  
  Look for any relevant SAP Notes that may address known issues related to the TT202 error. You can search for notes in the SAP Support Portal.
  
  
  
  Consult Logs:
  
  Check the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that may provide more context.
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  SMGW: SAP Gateway Monitor
  
  
  
  SAP Documentation: Refer to the official SAP Help Portal for detailed documentation on RFC and connectivity issues.
  
  
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to diagnose and resolve the TT202 error effectively. If the problem persists, consider reaching out to your SAP Basis team or SAP support for further assistance.