How To Fix TRUST033 - Cannot create RFC connection

SAP Error Message - Details

• Message type: E = Error

• Message class: TRUST - Certificate Management

• Message number: 033

• Message text: Cannot create RFC connection

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message TRUST033 - Cannot create RFC connection ?

  The SAP error message TRUST033: Cannot create RFC connection typically indicates an issue with the configuration of Remote Function Call (RFC) connections in the SAP system. This error can arise due to various reasons, including incorrect settings, missing authorizations, or network issues. Below are some common causes, potential solutions, and related information for troubleshooting this error.
  Causes
  
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in transaction SM59. This could include incorrect connection parameters, such as the target system's hostname, system number, or client.
  
  
  Authorization Issues: The user trying to create the RFC connection may not have the necessary authorizations. This can include missing roles or profiles that allow for RFC communication.
  
  
  Network Issues: There may be network connectivity problems between the SAP systems. This could be due to firewall settings, DNS resolution issues, or other network-related problems.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured, preventing the establishment of the RFC connection.
  
  
  SAP Kernel or Patch Level: Sometimes, bugs in the SAP kernel or missing patches can lead to issues with RFC connections.
  
  
  Solutions
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 and verify the settings of the RFC destination.
  Ensure that the connection type (e.g., T, 3, etc.) is appropriate for your use case.
  Test the connection using the "Connection Test" button in SM59.
  
  
  
  Review Authorizations:
  
  Ensure that the user has the necessary authorizations to create and use RFC connections.
  Check the roles assigned to the user and ensure they include the necessary permissions for RFC operations.
  
  
  
  Network Troubleshooting:
  
  Verify that the target system is reachable from the source system. You can use tools like ping or telnet to check connectivity.
  Check firewall settings to ensure that the required ports for RFC communication are open.
  
  
  
  Check SAP Gateway:
  
  Ensure that the SAP Gateway service is running. You can check this in transaction SMGW.
  Review the gateway logs for any errors that might indicate issues with the service.
  
  
  
  Kernel and Patch Level:
  
  Check if the SAP kernel is up to date and if there are any relevant patches that need to be applied.
  Consult SAP Notes for any known issues related to your version of SAP.
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SMGW: SAP Gateway Monitor
  SU01: User Maintenance (to check user authorizations)
  
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC connections.
  
  
  Logs: Check system logs (transaction SM21) and developer traces (transaction ST22) for any additional error messages that may provide more context.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the TRUST033 error in your SAP system. If the problem persists, consider reaching out to SAP support for further assistance.