1) exporting a datfile in old format can only be done if I first go to dir2dat, load a profile with "deprecated", and then go back to datfile export. Is there a way to directly export a datfile in old format?
2) On my dumping machine I'm creating a full unmerged collection on MAME roms. No samples, no CHD.
So I point profiler to MAME executable, go to scan - set information, and follow your instructions (%H=1;%P=1 Apply, Invert, check 'initial invert' checkbox). After scanning I get error that 7 CHDs are missing: ddrja, ddrjb, mfightcc, p911uc, thrild2c, tsurugie, tsurugij.
On a different machine I have fully merged collection (no samples, no CHD) and there are no problems.
So it looks like the problem on those 7 CHD exclusion is only in unmerged sets.
Thank you very much for your help.