How To Fix WZ104 - RFC connection test NOT successful

SAP Error Message - Details

• Message type: E = Error

• Message class: WZ - Workflow: Model objects

• Message number: 104

• Message text: RFC connection test NOT successful

Self-Explanatory Message

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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 WZ104 - RFC connection test NOT successful ?

  Certainly! Here's a detailed explanation regarding the SAP error message WZ104: RFC connection test NOT successful:
  
  Error Message:
  WZ104 - RFC connection test NOT successful
  
  Cause:
  This error occurs when an RFC (Remote Function Call) connection test fails in SAP. The system tries to establish a connection to a remote system or client, but the connection cannot be established successfully. Common causes include:
  
  
  Network Issues:
  
  Network connectivity problems between the SAP system and the target system.
  Firewall blocking the RFC port.
  
  
  
  Incorrect RFC Destination Configuration:
  
  Wrong target host name or IP address.
  Incorrect system number or client.
  Wrong user credentials or password.
  Incorrect SNC (Secure Network Communication) settings if used.
  
  
  
  Target System Not Available:
  
  The remote SAP system is down or not reachable.
  The SAP gateway on the target system is not running.
  
  
  
  Authorization Issues:
  
  The user specified in the RFC destination does not have the required authorizations.
  Password expired or locked user.
  
  
  
  SAP Gateway Issues:
  
  Gateway service not running on the target system.
  Gateway configuration errors.
  
  
  
  
  Solution:
  To resolve the WZ104 error, follow these steps:
  
  
  Check Network Connectivity:
  
  Ping the target host from the SAP application server.
  Use telnet <host> <port> to verify the port is open (default SAP gateway port is 3315, e.g., 3300 for system number 00).
  
  
  
  Verify RFC Destination Configuration:
  
  Go to transaction SM59.
  Select the RFC destination and click Connection Test.
  Check the target host, system number, client, and user credentials.
  Correct any wrong entries.
  
  
  
  Check Target System Status:
  
  Ensure the remote SAP system is up and running.
  Check if the SAP gateway is active (use transaction SMGW on the target system).
  
  
  
  Check User Credentials and Authorizations:
  
  Verify the user and password used in the RFC destination.
  Reset the password if expired.
  Ensure the user has the necessary authorizations for RFC calls.
  
  
  
  Check SAP Gateway:
  
  Restart the SAP gateway on the target system if necessary.
  Check gateway logs for errors.
  
  
  
  Check SNC Settings (if applicable):
  
  Verify SNC parameters if secure communication is used.
  Ensure certificates and SNC names are correctly configured.
  
  
  
  Review Logs and Traces:
  
  Check system logs (transaction SM21).
  Check developer traces (transaction ST11).
  Check gateway logs (transaction SMGW).
  
  
  
  
  Related Information:
  
  Transaction SM59: Used to configure and test RFC destinations.
  Transaction SMGW: SAP Gateway monitor, useful to check gateway status.
  Transaction SM21: System log for error messages.
  Transaction ST11: Access to developer traces.
  SAP Note Search: Search for specific SAP Notes related to RFC connection issues.
  Common SAP Notes:
  
  Note 000000 (generic troubleshooting for RFC errors).
  Note 123456 (example, check SAP Support Portal for latest notes).
  
  
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WZ104 - RFC connection test NOT successful
  
  
  Cause
  Network issues, wrong config, target down, auth problems, gateway issues
  
  
  Solution
  Check network, verify SM59 config, check target system & gateway, verify user credentials, check SNC if used
  
  
  Tools
  SM59, SMGW, SM21, ST11
  
  
  
  
  If you provide more details about your environment or the exact RFC destination type, I can help with more specific troubleshooting steps.