The simulate is meant just to run through the code quickly and tell you how long it will take to complete, you do not see a representation of what it does on the screen . It is basically a check to make sure it will run and what time it will take.
 If you want to see a real time run through just press start like you would normally.
Hood

Hood,

   Well, it sure gives a lousy estimate of the run time, then.  It's off by a factor of 10 or more.  When I try to run it normally, it just hangs at line 110.  No DRO updates, no path updates, nothing.

Regards,
Ray L.

please attach your code and I will see if it acts the same here
Hood

Hood,

    Code is attached.  Note this is setup for 2D milling, manual Z, so there are M00s where each Z move would be.

Regards,
Ray L.

Runs through fine here, says it will take 38mins 56 seconds.
Hood

Hood,

    Interesting....  This was a fresh install of v3.041 on a new laptop.  Is there some configuation I need to do?

Regards,
Ray L.

you got the xml from your machine in there?
Hood

Actually had my motors tuning set way down, put it back up and its now saying 37mins simulation, It will however depend what your rapids are set to what time is actually calculated as rapids are taken into account when simulating.
Hood

Just out of curiousity, what material are you cutting, feeds and spindle seem really slow unless is 316 with HSS cutters.
Hood

you got the xml from your machine in there?
Hood

Hood,

    No, just using whatever was there in the install, which is reasonably close to the real thing in terms of rapid speed.

    That part was 304 SS, with HSS tools - my first ever SS project.  Came out perfect, and only ruined one tool, when the coolant stopped mid-cut.

Regards,
Ray L.