Run-Time Error '53 Options

[klsc85]

I've run into a snag setting up rolling stock with AM for the Cascades Crossings AG westbound template. I've had no problem setting up the eastbound template, but when I try to set up the westbound template with the exact same stock, AM gives me a "Run-Time '53'" (file not found) error. I can't get a debug file to generate, so I can't figure out what file might be missing.

Any thoughts?

Uncle E