Corrupted Solver?

[ptc-4310378]

In 2001, attempted to set up a solver function built on another solver function and received an "unknown error" message.

Then my jaw dropped when I saw all the other solver in the file fail with the same "unknown error". They used to work flawlessly.

Tried a simple solver in a new file: "unknown error"!

Should I reload MathCad or can it be repaired?

Thanks

[ptc-4310378]

Didn't have to reinstall.......closing and restarting MCad cleared the fault. Strange.