has any one failed to compile a webGL project while getting this error? Error building Player: IOException: Sharing violation on path Z:/_Dev/UnityTest/Assets/../Temp/EmscriptenWork Yes, I have my project on the Z drive. Originally it was in Mydocuments on the C drive but failed the same way. I'm guessing either im missing something important OR I failed to set some flags correctly. not sure.. The project has only 1 scene with a white sphere in it.. very basic,,no code .. and yes,, the scene has been added to the build.