50g

Hi everybody

I use this lib for Laplace and Z transform.
For Laplace Transform, in the notice, he wrote this:

                            ->L,flg2      2: { 'COS(b)''-(2*SI...
1:      't*COS(a*t+b)'  ->->->->->->->->  1: { 1 0 '2*a^2' 0 'a^
                                                  4' }

But for me, if I've 't*COS(a*t+b)' in the first level, the command return this error:
"Error: 
Bad Argument Value"

And I don't understand where is the problem.

Someone can help me, please :)

Nico