when you installed poser 12 did you reinstall the dson importer and point the directory to poser software folder instead of it being directed to Smithmicro I believe the install use to point to my poser 11 folder in the c:/drive and so I changed the directory to dosn importer to my poser 12 location

I reinstalled my dosn importer directly into c:/ poser software because when i first installed poser12 I had a bunch of dson importer problems and when i reinstalled dosn import and pointed it to install into my poser12 folder it was working So you might try reinstalling dosn importer. or check your program foldr to see if it installed

screencap pointing doson installer to poser12 folder location

poser 12 with dson folder

second screen shot poser 11 folder with dson