I replaced an early part in an assembly using 'Layout'. Some feature references were missing. When I got this component to play nice and regen, I noticed a bunch of other compents that were frozen, suspended or suppressed. When I got this mess straightened out, I decided to find out if anything else, of less obvious regen status, was suppressed/frozen/etc. "Search" has a Status page where you can set 'equal to' to 'Frozen', 'Suppressed', 'Packaged' and more. I tried 'Frozen' and found a bunch more components in a Group (which showed itself 'Regenerated' but which contained components which were 'Frozen'). The Search utility, when it finds stuff, expands the group or whatever to show the hidden components( the Group showed as Regenerated but the components hidden inside were Frozen). Search is a constantly, remarkably useful tool.