How To Fix 883003 - Error &1 while establishing RFC connection

SAP Error Message - Details

• Message type: E = Error

• Message class: 883 - REA Distributed Systems: Sender Functionality

• Message number: 003

• Message text: Error &1 while establishing RFC connection

What causes this issue?

An error occurred while the RFC connection was being established. An
attempt was made to call the function module <ZH>&V3&</> on the system
<ZH>&V4&</>.
The error message reads: &V2&

System Response

The system terminates the BOM explosion.

How to fix this error?

Notify your system administrator.

Procedure for System Administrators

Check the entries in the <DS:TRAN.SM59>RFC maintenance transaction</>.
Check the REA Customizing settings for the
<DS:TRAN.J7LRRE711000150>BOM Explosion User Exit</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 883003 - Error &1 while establishing RFC connection ?

  The SAP error message "883003 Error &1 while establishing RFC connection" typically indicates that there is an issue with the Remote Function Call (RFC) connection between SAP systems. This error can arise due to various reasons, and understanding the cause is crucial for troubleshooting.
  Possible Causes:
  
  
  Network Issues: There may be network connectivity problems between the SAP systems. This could include firewall settings, network outages, or incorrect routing.
  
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system. This includes incorrect parameters such as the target system's hostname, system number, client, user credentials, etc.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to establish the connection.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running on the target system, or there may be issues with the gateway configuration.
  
  
  SAP System Down: The target SAP system may be down or not reachable due to maintenance or other issues.
  
  
  Version Compatibility: There may be compatibility issues between different versions of SAP systems.
  
  
  Solutions:
  
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the two systems. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination that is causing the error.
  Ensure that the hostname, system number, client, and user credentials are correct.
  Test the connection using the "Test Connection" button in the RFC destination configuration.
  
  
  
  Check User Authorizations: Ensure that the user credentials used for the RFC connection have the necessary authorizations. You can check this in transaction SU01.
  
  
  Check SAP Gateway: Ensure that the SAP Gateway service is running on the target system. You can check this using transaction SMGW.
  
  
  Check Target System Status: Verify that the target SAP system is up and running. You can check this by logging into the target system or checking system logs.
  
  
  Review Logs: Check the system logs for any additional error messages that may provide more context about the issue. You can use transaction SM21 to view the system log.
  
  
  Consult SAP Notes: If the issue persists, consult the SAP Support Portal for any relevant SAP Notes that may address this specific error.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SU01: User Maintenance
  SMGW: Gateway Monitor
  SM21: System Log
  
  
  
  Documentation: Refer to the official SAP documentation for more detailed information on RFC connections and troubleshooting.
  
  
  By following these steps, you should be able to identify and resolve the cause of the "883003 Error &1 while establishing RFC connection" in your SAP environment.