This message occurs if there is a mapped drive Q:\ on the computer used as server.
That mapped drive on the server should be deleted/disconnected as it will prevent the proper backup and maintenance of the database at night.
1.Go to the computer used as server (not a workstation).
2.In the Windows File Explorer select the This PC page.
3.On the right, in the Devices and Drives section, right-click on the Q:\ drive and select Disconnect.
4.Start the application server, as described here.
5.If a message appears, stating that "Another instance of the Q++ Application Server is already running", then click OK, and then wait for about 30 seconds for the server application to notice that the Q:\ drive no longer exists.
If the above does not work
Following the above steps should get rid of the present message.
If it does not, then, as a last resort:
1.Sitting at your workstation (not the server), go and manually delete the file SpuriousQDrive.flg located in the folder Q:\Q++ServerXV4\.
If neither solution works, please contact technical support.