Question
What does it mean by Library Not Registered?
I am trying out MathCad 15 and keep getting an error message that I have never seen before (I have used MathCad 6 and 13 in the past). If I enter something like Frequency:=60 and then try Frequency= , I get an error message that says Library Not Registered. What is it trying to tell me? Thanks for the help.

