I was mousing around the DOS fractint formula screen and found an interesting listing which appears to have an error. I don't know enough to be sure but here is what I have noticed: Formulas <chip>, <hopalong>, <quadruptwo>, & <threeply> are all never init'ed. The information page (F2 with the formula highlighted) states setting z(0)=y(0)=0: with a colon at the end of the line for initialization. All of the above formulas on the <z screen> show a semi-colon at the end of the line. Does this make a difference? Since I run DOS I don't have all the fancy cut and paste stuff to rewrite and test so I haven't done that yet to find out if there is a difference. Just noticed it when playing around, and thought I'd ask the programers. Thanks for your time. David M Fisher