HOW TO ENABLE MODELCHECK GATEKEEPER IN WINDCHILL ?
I found the below statement in ptc forum, but I am unable to find the location inside preference management.
PTC Creo Modelcheck Validation—Specifies whether to perform PTC Creo Modelcheckvalidation at check in. The default is NO. Enables the PTC Creo Modelcheck Gatekeeper when set to YES.