build not working

Unity Engine
1

I have a script with alot of file IO in it, when i save the script there are no compiler errors, but when i try to build the game, is gives me the eror:

Error building Player: IOExeption: Failed to Move File / Directory from ‘Temp/StagingArea/Data’ to ‘C:/Users/myuser/Desktop/xxx\Alpaca_Data’.

how do i fix this problem?

(the project name is alpaca)

(on the eror message one of the /'s is a)

2

This probably means you have a file open in another program that is locking it.