1.. Input directory has no mp4 or avi files.

1.. Videos not formatted properly

1.. Only __ videos found.

1.. Videos not the same length.

1.. Unsupported video codec detected.

1.. Unable to load calibration.

1.. Required camera parameter groups not present.

1.. Qualisys calibration has inconsistent FOV

1.. Data not loaded.

1.. Camera extrinsics optimization step 3 failed.

1.. Unable to construct a continuous volume from overlapping chessboard frames.

1.. Track people not complete

1.. Abnormally high tracking errors

2.. Coordinate system is out of place in one camera view.

2.. Coordinate system is in different positions and/or orientations in all camera views.

2.. Coordinate system is in an incorrect but consistent position and/or orientation in all camera views

2.. Skeleton is consistently outside the body

2.. Skeleton is momentarily incorrect

2.. Skeleton is incomplete.

2.. Skeleton is completely missing.

2.. Skeleton is jittery.

3.. Calibration files not visible in file browser.

3.. Theia3D freezes when attempting to open the application

3.. Theia3D crashes when attempting to process a calibration or movement trial.

1.. Invalid video.