QT Wallet backup - A fatal error occurred

While trying to backup wallet in Syscoin QT 4.1.3 (unlocked) on win10 it crashes with A fatal error occurred. Syscoin can no longer continue safely and will quit.

When you restart QT does it load correctly. If so manually make a copy of your wallet.dat by going to %APPDATA%\Roaming\Syscoin\
Depending on your version there might be a ‘wallets’ sub folder that holds it

Works if I export it to C: drive, on any other drive letter it fails. Thanks for workaround solution.