How To Fix SCTC_SC002 - Error in communication to application server (RC &1 &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: SCTC_SC - CTC System Copy

• Message number: 002

• Message text: Error in communication to application server (RC &1 &2)

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SCTC_SC002 - Error in communication to application server (RC &1 &2) ?

  The SAP error message SCTC_SC002, which indicates "Error in communication to application server (RC &1 &2)," typically arises when there is a communication issue between the SAP system and the application server. This can occur due to various reasons, including network problems, configuration issues, or server unavailability.
  Causes:
  
  Network Issues: Problems with the network connection between the client and the application server can lead to communication errors.
  Server Unavailability: The application server may be down or not reachable due to maintenance or unexpected outages.
  Configuration Errors: Incorrect settings in the SAP system configuration, such as incorrect instance numbers or hostnames, can cause communication failures.
  Firewall Restrictions: Firewalls or security settings may block the necessary ports for communication between the client and the server.
  Load Balancer Issues: If a load balancer is used, it may not be routing requests correctly to the application server.
  SAP Kernel Issues: Problems with the SAP kernel or outdated components can also lead to communication errors.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the client and the application server is stable and functioning. You can use tools like ping or traceroute to diagnose network issues.
  Verify Server Status: Check if the application server is up and running. You can do this by accessing the SAP system through the SAP GUI or checking the server logs.
  Review Configuration Settings: Ensure that the configuration settings in the SAP system (such as instance numbers, hostnames, and ports) are correct. You can check the SAP GUI configuration and the SAP Logon pad settings.
  Check Firewall Settings: Ensure that the necessary ports for SAP communication (typically port 3200 for the application server) are open and not blocked by a firewall.
  Examine Load Balancer Configuration: If a load balancer is in use, verify that it is correctly configured to route requests to the appropriate application server.
  Update SAP Kernel: If the issue persists, consider updating the SAP kernel and other components to the latest version, as this may resolve underlying bugs or compatibility issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to SCTC_SC002 for any specific patches or updates that may address this error.
  System Logs: Review the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the communication failure.
  Transaction SM51: Use transaction SM51 to check the status of application servers and their availability.
  Transaction ST22: Check for any dumps that may have occurred during the time of the error using transaction ST22.
  
  If the issue persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance.