I run the very last of the PRT's and for 10 years I have had no problems. And still haven't with the shopbot. But today the computer I run the machine with gave up the ghost and refused to read the hard disc, So I have installed the controll software on another computer. The installation seems ok, but it doesnt show correct in the preview. To make myself clearer, On my main computer, the one I design on, the preview shows fine. I copy the file across top the new computer. I read it in the file edit and it is identical to the one i copied. I look at previes and it isnt showing correct. What am I or am I not doing? As you may imagine, I have some material on the table waiting to be cut for an anxious customer!!!