OPUS-RS requires quality observations, not only in your RINEX file but also in the CORS RINEX files it is trying to use. Very often it can take extra time for the CORS folders to get populated with enough good information.
It appears OPUS-RS stopped while it was reading the Morristown, NJ CORS file. That is not your fault. If you have not gotten a solution yet, exclude NJMT from consideration.
Williwaw, check the raw XYZ position at the beginning of your RINEX file. That is the location OPUS uses to select your CORS. Just because you know where you had your receiver setup, does not mean your receiver sat there long enough to actually update it’s position for the record. Have had that problem in the past, used 2 receivers one day and set them up hundreds of miles away the next day. Got a good solution for one but not the other. Replaced the raw XYZ from the first receiver and VOILA!
Paul in PA