Does the issue with no longer getting hypotheses happen the very first time you change models, or does it happen the second and later times only? That is, can you make one single successful change and still get hypotheses or does it stop working any time there is a change request?
The file not found errors are actually false positives – the .DMP and .dic files are being loaded correctly, but this could nonetheless be a bug due to the “couldn’t get attributes” issue.