RFC connection to messaging system is not available

What causes this issue?

There is a problem with the RFC connection to the messaging system.

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

System Response

You cannot send the document to the tax authorities.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.