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Fixed

Fixed in 6000.3.15f1, 6000.4.6f1, 6000.5.0b7, 6000.6.0a4

Fix In Review for 6000.0.76f1

Votes

1

Found in

6000.0.69f1

6000.3.9f1

6000.4.0b11

6000.5.0a8

6000.6.0a1

Issue ID

UUM-139812

Regression

Yes

"ArgumentOutOfRangeException" is thrown when selecting a transition to an animation shorter than 3 frames with "Loop Time" enabled

Mecanim Animation

-

How to reproduce:

  1. Open the attached project “IN-139761”
  2. In the Project window, double-click the “Assets/MainSceneController” asset to open it in the Animator window
  3. In the Animator window, select the transition arrow from “ChiliPotChiliRainDefault” to “ChiliPotActiveIdle”
  4. Observe the Console

Actual result: ArgumentOutOfRangeException and GUI errors are thrown in the Console
Expected result: No errors are thrown in the Console

Reproducible with: 6000.0.73f1, 6000.3.0a5 (f9a1fab5607a), 6000.3.13f1, 6000.4.3f1, 6000.5.0b4, 6000.6.0a2
Not reproducible with: 6000.3.0a4

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Note: Error messages that are repeatedly thrown:
- “ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.”
- “GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.”

  1. Resolution Note:

    Fixed in 6000.6.0a4

  2. Resolution Note (fix version 6000.6.0a4):

    Fixed in 6000.6.0a4

  3. Resolution Note (fix version 6000.5.0b7):

    Fixed in 6000.5.0b7

  4. Resolution Note (fix version 6000.4.6f1):

    Fixed in 6000.4.6f1

  5. Resolution Note (fix version 6000.3.15f1):

    Fixed in 6000.3.15f1

  6. Resolution Note (fix version 6000.0.76f1):

    Fixed in 6000.0.76f1

Comments (1)

  1. jamesgratrix1010101

    Apr 17, 2026 10:20

    Can confirm this is occurring on version 6000.3.10f1 The issue occurs with any transition that comes from a clip which is less than 3 frames long and has loop time enabled. This does not seems to affect transitions going to an animation clip with is less than 3 frames and has loop time enabled however.

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