Question
Help! Mathcad wont recognize any of my old files
Ive been using Mathcad15 as Im familar with the interface. My company had a mathcad spreadsheet which we used every 3-4 months as needed. I used it 3 months ago and it worked perfectly.
Now, I cannot open any of our spreadsheets in mathcad. I get the error :The requested file is not a valid Mathcad XML worksheet."
We have been using these worksheets for years and they have always opened. We havent done anything different in Mathcad. Any ideas?

