How To Fix CMS101 - COMMUNICATION_FAILURE in RFC call &1 (&2): &3&4

SAP Error Message - Details

• Message type: E = Error

• Message class: CMS - KPro: Content Management Service

• Message number: 101

• Message text: COMMUNICATION_FAILURE in RFC call &1 (&2): &3&4

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 CMS101 - COMMUNICATION_FAILURE in RFC call &1 (&2): &3&4 ?

  The SAP error message CMS101, which indicates a "COMMUNICATION_FAILURE" in an RFC (Remote Function Call) call, typically arises due to issues in the communication between SAP systems or between an SAP system and an external system. Here’s a breakdown of the potential causes, solutions, and related information for this error:
  Causes:
  
  Network Issues: Problems with the network connection between the systems can lead to communication failures. This could be due to firewalls, routing issues, or network outages.
  RFC Destination Configuration: Incorrect configuration of the RFC destination in the SAP system can cause communication failures. This includes incorrect hostnames, IP addresses, or ports.
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations to perform the requested operation.
  System Availability: The target system may be down or not reachable due to maintenance or other issues.
  Timeouts: The RFC call may be timing out due to long processing times or network latency.
  SAP Gateway Issues: Problems with the SAP Gateway service can also lead to communication failures.
  
  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 in the SAP GUI and check the configuration of the RFC destination. Ensure that the connection parameters (like hostname, service, and client) 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 configuration or the network.
  Check User Authorizations: Ensure that the user credentials used for the RFC call have the necessary authorizations to access the target system and perform the required operations.
  Monitor System Status: Check the status of the target system to ensure it is up and running. You can use transaction SM51 to see the list of application servers and their statuses.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the RFC destination configuration.
  Review SAP Gateway Logs: Check the SAP Gateway logs for any errors or warnings that might provide more context on the communication failure.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM51: List of SAP Servers
  SM21: System Log
  ST22: Dump Analysis
  SICF: HTTP Services
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC communication failures.
  Documentation: Review SAP documentation on RFC and communication settings for best practices and troubleshooting steps.
  
  By following these steps, you should be able to diagnose and resolve the CMS101 communication failure error in your SAP environment.