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Question by ryisnelly · Dec 14, 2013 at 03:12 PM · errormessage

unity engine wont work

when i try to press play, i cant do anything and i get these errors even when i start a new project with nothing in it,these are the three errors that i get when i click play. thank you

1) InvalidOperationException: Collection was modified; enumeration operation may not execute. System.Collections.Generic.List`1+Enumerator[UnityEditor.EditorWindow].VerifyState () System.Collections.Generic.List`1+Enumerator[UnityEditor.EditorWindow].MoveNext () UnityEditor.DockArea.OnDestroy () (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/GUI/DockArea.cs:409) UnityEditor.EditorApplicationLayout:FinalizePlaymodeLayout()

2) Invalid editor window UnityEditor.OcclusionCullingWindow UnityEditor.EditorApplicationLayout:FinalizePlaymodeLayout() C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/GUI/DockArea.cs:409) UnityEditor.EditorApplicationLayout:FinalizePlaymodeLayout()

3) GUI Window tries to begin rendering while something else has not finished rendering! Either you have a recursive OnGUI rendering, or previous OnGUI did not clean up properly.

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avatar image RageGolem10 · Dec 14, 2013 at 04:50 PM 0
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Did you try installing a different (older) version of unity?

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Answer by stevethorne · Dec 14, 2013 at 03:39 PM

Try resetting the layout for your workspace. Select a layout from the drop-down in the top right corner

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avatar image ryisnelly · Dec 14, 2013 at 03:48 PM 0
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that has worked thanks for that, any ideas why this error happened?

avatar image stevethorne · Dec 15, 2013 at 05:49 AM 0
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Just happens every once in a while. Sometimes the windows in the editor gui will get messed up and a simple layout reset will fix it. I suggest saving your layout so that you can reset it to what you prefer, and not have to fiddle with it when you reset it.

avatar image Mapleguy · Jun 12, 2016 at 08:37 PM 0
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This man is a hero of the modern age.

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Answer by GraviterX · Dec 14, 2013 at 05:33 PM

Try deleting the Unity folder that came when you downloaded it and re download Unity.

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avatar image atr0phy · Nov 05, 2014 at 06:16 PM 1
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Why stop there? Just reformat the entire hdd, that'll certainly solve the problem.

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