Strange behavior [Spriter/Unity]

[RoyalCoder88]

Hi friends,
I recently discovered the Spriter :-P software (used Spine until)...I need Spriter for making animations for Unity (v 4.6.1f), but I have some issues :???: and I'm wondering if are there solutions for this problems: First of all for some animations when are imported I get this :???: error:

Quaternion To Matrix conversion failed because input Quaternion is invalid {-1.#IND00, -1.#IND00, -1.#IND00, -1.#IND00} l=-1.#IND00
UnityEditor.AnimationUtility:GetCurveBindings(AnimationClip)
UnityEditorInternal.AnimationWindowState:get_allCurves() (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/AnimationWindowState.cs:237)
UnityEditorInternal.AnimationWindowHierarchyDataSource:FetchData() (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/AnimationWindowHierarchyDataSource.cs:43)
UnityEditor.TreeView:ReloadData()
UnityEditorInternal.AnimationWindowHierarchyDataSource:UpdateData() (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/AnimationWindowHierarchyDataSource.cs:146)
UnityEditorInternal.AnimationWindowState:Refresh() (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/AnimationWindowState.cs:525)
UnityEditorInternal.AnimationWindowState:OnGUI() (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/AnimationWindowState.cs:70)
UnityEditor.DockArea:OnGUI()

.this error generates strange behavior for this particular animation, video example: View My Video
Please help me as soon as possible...Thanks in advance !

[dval]

Are you sure it's spriter2unity? The files listed in your log are not part of this repository. May try starting with a clean project and see if you still have errors.