Hi Roman, I prefer the latter option w/ Hide Common. I want to allow merging between systems [old hunchback]. Was just curious why this was never an option in the GUI vs having to enter it manually in the *.ini. Thx -

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When selecting "hide common" all prompts will be answered with "yes" internally. If you want to allow merging between systems, answer NO to the merging prompts or use "hide common" + "Pro_ForbidSystemMerging = off" in cmpro.ini

Roman Scherzer
ClrMamePro

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john iv
http://www.classicgaming.com/mame32qa