I've read all the postings and helpful info on fixing the Divide by Zero problem. After downloading the Patch26, unzipping it, going into the FOXPRO DOS command box, and typing the three lines many times with no results, I finally figured out that there are two spaces in each of the three dos commands: you should type attrib(space)-r(space)foxw2600.esl. the second line is patch26(space)foxw2600.esl. the third line is attrib(space)+r foxw2600.esl. Then type exit and hit enter. It seems funny to put a dash and a plus sign into a command, but they are really there - just like if you were typing them in a letter. Hope this helps someone who may be confused. I'm so glad DOS is gone for everyday use!!!