Hi, I am a senior student with a term project for my CNC milling class and was tasked to do something similar to this topic which is to mill out a bust of myself within a 3 in x 5 in (cylindrical) initial stock. Am using a HAAS 5X milling machine. No problem with roughing whatsoever but when getting to semi-finish and finishing I opted to use Multi-surface but my Mastercam 2018 always bugs out when initial computation reaches a certain facet (facet 604000). same with Rotary operation. Roughing operations reached facet 1200000 and went on to generating toolpath(s) with ease. Any idea on how to tackle this problem or would using another operation be better? I use a cleaned and processed .stl file generated from photogrammetry*