I think it looks like the problem might be from launching c2l using the cmdline filename argument from sublime or other editor. When opening the file manually it seems to MOSTLY behave the same as c2h (aka, as expected).
But then I noticed that only sometimes opening manually would work, and sometimes not. Almost always the first attempt to open fails, with a message “Cannot open #include’d file …”, but then any following open attempts work. It seems like maybe the working directory gets sets after opening or something?
I’ll zip up the simplest example anyway tho… it has the first attempts at importing a plant, which seems to be very uncooperative right now too. There will be lots of unused include files, but the custom UDOs will all be labeled with where to find them so it should hopefully be pretty painless.
I still have some init/channel issues to work out based on 6.10, it breaks the “bypass_gui” function and maybe a few other things… but for the most part this simplest example will be ok.