The animation viewer throws errors:
Error in expression <ns = [[],[]];
BIS_fnc_animViewer_unit = _objnull;
BIS_fnc_animViewer_animData = >
Error position: <_objnull;
BIS_fnc_animViewer_animData = >
Error Undefined variable in expression: _objnull
File A3\functions_f\Debug\fn_animViewer.sqf, line 203
About 50% of the time the viewer actually fails to launch. The only way out of this is to quit and restart the game.