How To Fix TB427 - Error in RFC connection: & (&)

TB427 - Overview

• Message type: E = Error

• Message class: TB - SM31 table maintenance messages

• Message number: 427

• Message text: Error in RFC connection: & (&)

What causes this issue?

An error occurred when constructing a link to another system.

System Response

The comparison with the system specified cannot be carried out.

How to fix this error?

If the called system is not active, please arrange for it to be
activated.
If the called system has another version of the comparator, please
ensure compatible versions are available.
If the interface to the called system has incorrectly set parameters
please adjust this using transaction SM59.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TB427 - Error in RFC connection: & (&) ?

  The SAP error message TB427 indicates that there is an issue with the Remote Function Call (RFC) connection. This error typically arises when there is a problem with the configuration or communication between the SAP systems involved in the RFC call. Here are some common causes, solutions, and related information for this error:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP systems.
  Incorrect RFC Destination: The RFC destination may be incorrectly configured or may not exist.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  SAP System Down: The target SAP system may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the communication between the systems.
  Incorrect Parameters: The parameters set in the RFC destination may be incorrect or incomplete.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the systems can communicate over the network.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in