Debugging Example: Navigating Workspaces

One of my scripts, processing video files using a VideoReader object, has errored, so I need to investigate to understand why. Because I have “Pause on Error” in my startup.m, execution has paused and I can query the data in workspaces. If the error occurs in a function that comes with MATLAB^®, my first step is to navigate up the stack to the first function that I have created.

(Orginally posted in Stuart’s MATLAB Videos Blog.)