OK, completed the scan:
1. pc98_cd: dorse93 and dorse93a folders were merged together (which seems correct) and CHDs were moved into the merged folder. CMP did NOT try to move the CHDs between pc98_cd and fmtowns_cd, which also seems correct.
2. fmtowns_cd: dorse93 and dorse93a were NOT merged. It also did not try to move them to pc98_cd. I would have assumed that it should have merged those two folders and CHDs to dorse93 as it did with pc98_cd? This may be an issue. Since it didn't try to merge the two folders, I wonder if it just skipped them?
3. pro student: CMP asked me to merge the CHDs in prostudg and prostudgr into prostudg, which seemed correct. However, when I ran the scan AGAIN, it reported that prostudgr is "missing but fixable". The "r" CHD is still in the prostudg folder, but reported as missing after CMP wanted to merge them. So it wanted to merge them, then next run complained that the one was missing.
Note: I did have cricket in electron_cass AND bbc_cass, but I deleted it from electron_cass. The older versions of CMP seemed to think it was OK?
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I was playing around with trying to set up separate profiles and started with SoftwareList 3do_m2. When I set up the profile, set the rompath, and ran the scan, I found that CHDs and folders for imsarcng and shootr2d were not in my romset at all. But the scans using combined mode did not report that at all. I have no idea how long this has been the case. Once I downloaded and added them to the 3do_m2 folder, the scan completed with no error using just the 3do_m2 profile. When I run a normal scan using combined mode, the testing unneeded scan at the start does not report anything unneeded about the two new folders I added. That seems odd.
I also copied all of the existing hash folder files into a backup folder, deleted the hash files, and re-installed mame to get a clean set of hash files for the profile creation.
Matt