ok thanks for the information.

The other day I loaded a FSX Flight plan  fine and modified it and clicked save in CDU, then today I went to load it and FSX proceeded to crash.  I also tried it in 767 CDU and it did same thing.  I think FSX crashed six times before I finally got one to load ok.  

It seemed like the only thing that worked 100% of the time was to start from square 1 every time. Kind of frustrating to have to do that, but I know it works.