This is Javi from Spain, Do you remember me from the last trainig course in Orlando!
You will want to make sure that HEC-RAS is open and running on your machine when you read the solution into WMS 8.0.
I did it.
It is also good to have the HEC-RAS project open inside of HEC-RAS. What version of HEC-RAS are you running?
I tried with HEC-RAS 3.1.1 and even i install HEC-RAS 4.0, just to try, and happen the same
What is the build date on WMS 8.0 (Help | About menu command)?
Oct 15 2007
Greatins for Rusty.
Hope to see you guys soon in another course.