Requested functionality has not been configured

What causes this issue?

You are trying to use functionality which requires a connection to an
alternative database. Such a connection has not been configured or it
was not specified in the relevant settings.

System Response

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

How to fix this error?

Procedure for System Administrators

For detail information about the current status of access to an
alternative database, check transaction <DS:TRAN.HDBS_ERROR>HDBS_ERROR
</>.

Error message extract from SAP system. Copyright SAP SE.