Any one know how to use the Terco CNC mill simulator?

[rs4pro3]

I'm taking into to CNC this semester, we have yet to discuss anything about programing, or any thing like that. The teacher gave us a piece of paper with 50 lines of code and told us to Enter it into the Terco CNC Mill Simulator. So I typed all the code out, and uploaded it into the program, and it draws out the design it should. The design is the intials JBE the JB and the E are fine but the Bottom of the E is missing, I've entered all the code given, and there are no errors. So I'm trying to get the program to go code line by Code line so I can figure where the Code for the letter E starts so I can type in code for the bottom of the E. But everytime I enter the function key to do this the Terco Simulator shuts downs and closes.
Any Ideas? Oh the Simulator is a DOS Program.

[chrisd]

post or email me the code, I'll tell you what's wrong with it... I write g-code all day...
Look for a G0 Z(some positive number) after an arc move (G2 or G3) (this will be the end of the 'B')
then
G0X...Y... (rapid to the beginning of the 'E')
G1 Z-... (feed down in the z-axis)
several more of these moves...
then near the end of the program there will be one last
G1 Z-... <---this may be the line you are missing
X...Y...
G0 Z...
and then maybe, if you have a REALLY cnc-ready program:
M9 (coolant off)
G91G28 Z0 M5 (rapid to toolchange plane)
G28 Y0 (bring table forward)
M30 (end program and reset)
%