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

883003 - Overview

• 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