Hi Marco,
The problem appears to be that there are angular jumps in the BVH data.
The AnyInputBVH object has filters which can be used to remove these jumps of e.g. 2pi or 1pi see the Rotation2PiFixOnOff or Rotation1PiFixOnOff objects.
The error you get is because AnyBody is trying to apply this filter but while doing this it detects that the jumps on different rotations in the joint do not match perfectly and throws an error.
I tried to load your file and disable the angular filtering of jumps this you can do in the BVHSetting.any file in the following way
Rotation2PiFixOnOff = Off;
Rotation1PiFixOnOff = Off;
This seems to resolve the issue with this trial as far as i can see?
The cause of these jumps may relate to bad choices of rotational sequence in the export causing gimbal lock situations.
Best regards
Søren