I have resolved this problem.
The latest version of equest 3.65 (build 7163) gave me errors when trying to run the compliance analysis and I think it has something to do with the floor layering - specifically, slabs over crawlspaces or unconditioned spaces.
That or DBID 190000020000 is missing from the DOE database in the current version of equest perhaps?
I reverted back to the previous version of equest 3.65 (build 7154) and ran the compliance analysis on the exact same model.
Everything worked great, 100% compliance analysis with no errors, whatsoever.
Maybe this will help others with the same problem...
Chris Baker
CCI CAD Drafter