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Fixed in 5.6.0



Found in


Issue ID




UnityEngine.UI.dll is in timestamps but is not known in guidmapper...

Error message shown on first open of attached project:

Asset 'C:/Program Files (x86)/Unity/Editor/Data/UnityExtensions/Unity/GUISystem/4.6.0/UnityEngine.UI.dll' is in timestamps but is not known in guidmapper...

Comments (85)

  1. Mishaps

    Apr 24, 2015 06:21

    still in 5.0.1 and scripts go completely missing from assets whenever I re-name them, breaking my project. Like raise the severity level on this one yo!

  2. codestage

    Apr 23, 2015 20:45

    Same for me and 2 my co-workers - we had such issue on unity 5.0.1f1 both on Win 8.1 x64 and Mac OS (can't say which version).

  3. chlagou

    Apr 19, 2015 15:27

    I geting this in unity 5.0.1 please fix this quick

  4. Abhaya.Agrawal

    Apr 10, 2015 11:22

    I am geting this error in unity 5

  5. daybreaker93

    Feb 04, 2015 10:44

    different project, also found in 4.6.1f1 on first open

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