Mitchstein...
I finally found time to take a look at the bug you reported. It was caused by an invalidly formatted "lastUpdated" date. The date was not formatted according to the Json spec. And, while the software should not crash, it's important to point out that while Roku may overlook this problem now, it could prove to be a very subtle problem in the future should Roku tighten their validation to match the spec.
I will be issuing a software fix soon. Thanks for providing your file for testing.
FREE Windows desktop software for converting Direct Publisher channels to SceneGraph (SDK), for creating
BIF (Trick Play) files,
Roku (MRSS, JSON) feed files, and
FireTV feed files @
GitHub/rrirower.