HandBrake

Having transcoded my movie on to my desktop when i try and copy to my nas hard drive i am getting. The operation can't be completed because the item is in use .This is some thing i have done for years without problem
I am running Yosemite 10.10.1 I have made sure that handbrake has been quit properly before trying to copy but i just can't get past this

If HandBrake is already closed, then it's some other app keeping a reference to your files. Usually it's QuickTime Player, hiding in the background.

Bingo that was it problem solved thanks for your help