Yes. But not being a MasterCam expert either, I can't give you the exact line. Not doing much milling, I haven't had that alarm, but have had small arcs that the post wouldn't output in lathe post processors. Try "ltol", "mtol", or "vtol" first. I think "mtol" may have been the one that removed a .0001 taper on straight lines. Or it may have been the one that allowed the system to output an odd tenth diameter. These are my settings in the one post processor I looked at. ltol=.0002, mtol=.00001, vtol=.0001
As always, make one change at a time, and then see if it worked. Hope one of these works for you.