Unity Issue Tracker - NullReferenceException is thrown when inspecting a .FBX file with multiple clips and opening Animation tab

Fixed in 2020.2

Fixed in 2019.3, 2020.1

Votes

89

Found in

2019.3.0f6

2020.1.0a20

Issue ID

1215431

Regression

Yes

NullReferenceException is thrown when inspecting a .FBX file with multiple clips and opening Animation tab

Asset Importers

Jan 29, 2020

How to reproduce:
1. Open the attached 'project-1215431.zip' project
2. In the Project window select 'MultiClipSingleFile'
3. Observe the Console window
4. In the Inspector select 'Animation' tab
5. Observe the Console window

Expected result: NullReferenceExceptions are spammed in the Console window, the asset is broken
Actual result: No exceptions are thrown in the Console window, the asset is not broken

Reproducible with: 2019.3.0f6, 2020.1.0a20, 2020.1.0a21
Not reproducible with: 2017.4.36f1, 2018.4.16f1, 2019.2.20f1, 2019.3.0f5, 2020.1.0a1, 2020.1.0a19

Thrown exceptions:
1) NullReferenceException: Object reference not set to an instance of an object
UnityEditor.ModelImporterClipEditor.FindNextAvailableName (System.String baseName) (at <866e5e4337c74147a9a0249666f72660>:0)

2) NullReferenceException: Object reference not set to an instance of an object
UnityEditor.ModelImporterClipEditor.AnimationClipGUI () (at <866e5e4337c74147a9a0249666f72660>:0)
UnityEditor.ModelImporterClipEditor.OnInspectorGUI () (at <866e5e4337c74147a9a0249666f72660>:0)

Resolution Note (fix version 2020.2):

Fixed in 2020.2.0a1
Resolution Note (fix version 2020.1):

Fixed in 2020.1.0a26
Resolution Note (fix version 2019.3):

Fixed in 2019.3.4f1

Comments (56)

peterparnes

Feb 13, 2020 09:53

2019.2.21f is still ok and doesn't have the bug.
peterparnes

Feb 13, 2020 09:42

Just wanted to confirm that this bug has NOT been fixed in 2019.3.1f1.
Whirlwave

Feb 07, 2020 05:25

2019.3.0f6 here, same issue when trying to import .blend files directly (since internally it uses the .fbx importer anyway). Only feasible workaround that doesn't require a previous Unity install is to export multiple .fbx files (or in my case .blend files) each with one and only one animation, as mentioned in a previous comment.
RandomPatty

Feb 06, 2020 06:14

2020.1.0a21 same problem.
SCDaniel

Feb 05, 2020 10:18

Same issue. Making it very hard to progress! Opening in another version of Unity doesn't seem to help.
SwatMessiah

Feb 03, 2020 13:57

same problem when i import an FBX with an NLA Strip it causes lot of errors (only in unity 2019.3.0f6)
KliveOne

Feb 03, 2020 10:23

Sorry for the double post as there is no way to edit, however downgrading back to 2019.3.0.b11 fixed the issue for now. Just a heads up.
KliveOne

Feb 03, 2020 10:00

Im getting the same issue. The only change is that I updated my projects Editor from 2019.3.0b11 to 2019.3.0f6. Been doing this the whole project on the older unity. Just today after updating I am getting this error and cannot use/import my meshes with animation clips.
SixTimesNothing

Feb 02, 2020 10:44

The workaround of importing via an earlier version of Unity didn't work for me – same error occurs when bringing the imported asset back into the 2019.3.x project. The best way around this is to split the multi-animation clip .FBX file into multiple single animation clip .FBX files. Where there is only one clip, I didn't see the problem and the animations imported fine for me.

Was ok for me as I had a low number of animations – can imagine that would be annoying with complex characters, etc. until the Unity team can fix this one.
Thibaa

Feb 02, 2020 01:55

for anyone who got those kind of trouble just import your fbx in an older Unity version (2019.2.x worked for me) and export it as a package, then just bring it back in 2019.3 and it should go well (at least worked for me