Dear Dale,
Thank you for your patience.
The development team respond on the status of the wish list item CF-2116 [API ability to retrieve Revit Warnings like Manage tab--Inquiry pane--Warnings]:
We are aware of the request and will consider it for inclusion in a future release.
I also suggest having the developers file the request on idea station if not already there.
I hope this helps.
Cheers,
jeremy