the sequence file you sent opens a Pictures movie file f-1.jpg in the c:/users/terry/... directory.
So i am missing the hundreds of frames.
No matter, you start a movie at time 0.0 seconds and at 213 seconds you have a color wash of BLACK.
I loaded all your models, they loaded ok.
I opened your sequence. I was able to insert new timing rows.
You have time to get on a call? we can do a teamviewer. i cant duplicate your issue.
send an email to sean@meighan.net and we can set up a time