Hello Justinas,
I'd like to post, that the same Fatal Error occures directly after the clear installation of AutoPLANT Modeler SS6 (08.11.11.113) also (used Sample_Metric > New DWG > menu Piping > Setup > Component Preferences => FATAL ERROR).
The setting NETCONTROLS=0 in the AT.ini file also helps.
It is very funny, that after 15 minutes from the clear installation of "new" AutoPlant, I had to go in it by back doors over editing AT.INI file :-)
Regards
Tomas Placek
AS Chemoprag, a.s.
Czech Republic