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Fixed in 5.6.0



Found in


Issue ID




Unity does not rebuild GUID cache on boot

Steps to reproduce:
1. Open the attached project
2. Run Unity
3. Observe the Output console
4. You will the error messages:
Timestamps (39) and assets (42) maps out of sync.
Asset with GUID _ has empty path but has assettimestamp???

Expected result: Running without errors
Actual result: Unity console printing error messages (every time you boot the Unity editor)

Reproduced with: 5.4.1f1, 5.4.1p4, 5.5.0a6, 5.5.0b1, 5.5.0b5, 5.5.0b6
Not reproduced with: 5.3.6f1

Workaround: Reimport all assets

Rebuilding GUID cache happens with second boot(with 5.5.0a6 and lower)

Comments (5)

  1. Ae4a7e25a84bcb98e6b4bb65ee0ae67b?d=mm


    Jan 16, 2017 18:11

    I submitted a crash bug yesterday, and I received an Email from the Unity support team. I must admit that I'm impressed with the speed that the QA team responded. The message referenced this issue-tracker URL.

    A quote from the message: "I tried to reproduce the issue on the latest 5.6 version of Unity and the errors do not appear in the console anymore. "

    Hmm. I downloaded 5.5.0f3 yesterday. I guess it's time upgrade now...

  2. Ae371690b3859dd1515ccf3e9ddc2ec8?d=mm


    Dec 31, 2016 12:39

    This issue ID is listed as fixed in 5.5.0p1

  3. Fa61d1d207e442f6eb9675788e23493f?d=mm


    Dec 31, 2016 03:38

    Same for me 5.5.0f3, many projects with this innocuous error.

  4. 62b222454ef9a91fb912e4c2e7fbaa0d?d=mm


    Dec 29, 2016 19:39

    This isn't fixed. I keep trying to reimport and it is still there, it also slows down my editor.

  5. 049af58de2576dcea2756f08f6d1bbef?d=mm


    Dec 23, 2016 06:34

    Also happens with 5.5.0f3

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