Try refreshing explorer and see if it disappears i.e. view\refresh in explorer. Explorer takes a while to refresh when mappings are removed externally.

>I am mapping and unmapping drives from my application. The mapping portion appears to work fine. I see the drive appear in file explorer. But after Unmapping it, the drive appears with a red X in it. Then if I try mapping the drve again I get a error 1202. Something about attempting to connect but failing because the drive is in use. Is there a way to free up this unmapped drive, so I can use it again?