>In order to avoid the "Can't find the class" error, i always add some "set classlib to myclasslib.vcx addit" before i try to create a class's instance.But then i meet the "Alias is in use" error. :-(
>
>How can i find out whether should use "set classlib to"?
>
>Thanks!

if not 'MYLIB' $ set('classlib')
   set classlib to mylib.vcx additive
endif