You can create a MOV file that has the following flaws in the "MOVES" section, and which will cause DIRSIG to crash:
1. A "MOVE =" line that doesn't start with "MOVE ="
2. Missing one or more of the 10 required tokens (time, 3x location, 3x scale, 3x rotation)
3. Missing one or more commas between tokens
4. A very long line for the 10 tokens
Added a bunch of new checks to address these problems. The improved reader will be in the 4.6.0 release.