Are you seeing this error message in MET/CAL Editor?
Here is the solution for that error.
Go to your C drive\Users and find your user name (computer user name) : (This is what I see when I am logged in to my computer). You will substitute your user name.
Look for these two folders:
remove the mce32 folder from "Local":
Do the same thing in the "Roaming" directory
Restart MET/CAL Editor.