Here is the repaired file.
I opened it in an editor an deleted the region Mathcad was choking about (the region which included line 4859).
So possibly there is now missing at least one region in the file.
Thank you so much!!!!!!!!!!!!!!!!!!!!!! So quick!!!!!!!!!!!!!!
This is due tonight, I am really very worried about this document.
I am also trying to find the line in Notepad, but I can not figure out.
I can open it now!
Glad you got what you wanted. Hope you found the missing region(s) and could re-add it.
You may consider closing this thread now.