I got below errors and warning while converting orcad to allegro.,
WARNING (Layout To Allegro PCB Design), Empty mechanical pins were discarded from footprint '16QSOPLL_6'
WARNING (Layout To Allegro PCB Design), Netname 'DEFAULT' was discarded because it is not used by any component pad
ERROR (Layout To Allegro PCB Design), Error while writing the PCB Editor Database.
ERROR: Subclass name ALL not valid Allegro subcls for class ETCH. Quitting.
ERROR: loading Allegro database
How to clear those errors? in which version hotfix used to solve this problems?