i've been picking my brain over this for like 2 weeks now. I had a g-code program written for a 3d object. it work fine once we figured out how to use the hyperterminal to get the file to the machine. so the same person wrote a more complex file but didn't change anything as far as the type of g-code. i transfer the file through the hyperterminal. i push start and i'm always getting weird errors like invalid code g09,L& and others. the funny thing is i can try this program many times and it will react differently everytime. I eaven tried running the first program that worked and i can't get that to work either. If somebody could leadx me in some kind of direction hopefully forward. I would greatly appreciate it.