How To Fix CMS033 - Error in RFC communication - &

SAP Error Message - Details

• Message type: E = Error

• Message class: CMS - KPro: Content Management Service

• Message number: 033

• Message text: Error in RFC communication - &

What causes this issue?

The recipient system crashed.
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System Response

The function cannot be executed.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CMS033 - Error in RFC communication - & ?

  The SAP error message CMS033, which indicates "Error in RFC communication," typically arises when there is a problem with the Remote Function Call (RFC) communication between SAP systems or between an SAP system and an external system. This error can occur in various scenarios, such as during data transfer, when calling remote functions, or when accessing remote systems.
  Causes of CMS033 Error
  
  Network Issues: Problems with the network connection between the systems can lead to communication failures.
  RFC Destination Configuration: Incorrect configuration of the RFC destination in the SAP system can cause this error. This includes incorrect connection parameters, such as the target system's IP address, port, or user credentials.
  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 due to maintenance or other issues.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between the systems.
  SAP Kernel or Software Bugs: Occasionally, bugs in the SAP kernel or related software can lead to RFC communication errors.
  
  Solutions to CMS033 Error
  
  Check Network Connectivity: Ensure that the network connection between the systems is stable and that there are no issues with the network infrastructure.
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination that is causing the error.
  Test the connection using the "Test Connection" button to see if it is working correctly.
  
  
  Review User Authorizations: Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system and perform the required operations.
  Check System Status: Verify that the target system is up and running. You can do this by trying to log in to the target system directly.
  Firewall and Security Settings: Check if there are any firewall rules or security settings that might be blocking the RFC communication. Ensure that the necessary ports are open.
  Review SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address known issues related to RFC communication.
  Update SAP Kernel: If the issue persists, consider updating the SAP kernel or applying relevant patches that may resolve bugs related to RFC communication.
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SICF: Maintain HTTP Services (for web-based RFC calls)
  ST22: Dump Analysis (to check for any ABAP runtime errors)
  SM21: System Log (to check for system-related issues)
  
  
  
  SAP Notes: Always check for specific SAP Notes related to the CMS033 error for additional troubleshooting steps or patches.
  
  
  Logs and Traces: If the issue is complex, consider enabling traces for RFC communication to gather more detailed information about the error.
  
  
  By following these steps, you should be able to diagnose and resolve the CMS033 error in your SAP environment. If the problem persists, consider reaching out to SAP support for further assistance.