I imported an .stl with merge at a separate level of my finished part, then under Stock Setup selected it as my solid/mesh. Did the same with the drop down tab under Simulator. I have not tried the File> direct .stl import yet, but I don't see why one would work and the other wouldn't, especially when there are options under both Stock setup and the Simulation setup to use both.

Tried that as well. Still giving me a cylinder in the verify tab. Whats interesting is if I go to machine simulation > Verify, this doesn't happen, my stock comes through correctly and there is no cylinder.

I have my stock in my Stock Setup defined as shown in the 2nd picture. I used a .stl file and then defined the stock from that. However whenever I go to verify, the stock checkbox shows up as this cylinder instead. If I check the initial stock box then the stock as defined in my stock setup comes in correctly, but doesn't show any machine progress. Any idea how to fix this?