Android Build Fail, cannot copy classes.dex?

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Hi everybody,

I'm trying to build my game and run it on my android for to test for bugs and such but I keep getting this error: Error building Player: IOException: Failed to Copy File / Directory from 'C:/Program Files (x86)/Unity/Editor/Data/PlaybackEngines/AndroidPlayer/bin/classes.dex' to 'Temp/StagingArea/bin/classes.dex'.

I've been build and running successfully for a few weeks but suddenly it's started giving me this message. Any help would be appreciated. Thanks!

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Answer by cystemic · Jun 10, 2014 at 05:48 AM

I uninstalled unity and installed the new 4.5 version which seems to have fixed the problem. It looks like I was missing the android player folders in Unity's resources...

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Android Build Fail, cannot copy classes.dex?

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