I have reposted the file to "Solving 2nd order ODE more efficiently" . It was attached to my last reply where I explain why I can't work on the 14 saved 11. I see the message but not the work sheet. It might have been one of the many cases that produce the Panet PTC blank sheet at "Post message". I will spare the day or more to remove of all my "in-line" comments about what does not work about this web community. No point to comment anymore because not acknowledged and no visible action taken. It would be damn wise at the time of registry , new users be instructed to attach work sheet, images or any piece of information. like source paper ... etc. After > one month doing my best , I realise the PTC objective was to make as difficult as possible Mathcad collaboration by turning it to a chat box, a chat box really slow. The algorithm to make Mathcad collaboration work is the Akiva algorithm: download the work sheet, correct, repost ... i.e: no *zip.
jmG
