"Wearing" if check

[Tandria]

I read on the builder's lessons that the if check for wearing an object is the following:

if objinroom($o) == $1~

But I get an error on FKCheck every time I have it in. For example, here is what the prog currently is (with some stuff changed):

>time_prog number
if objininv($n) == $1~
or objiinroom($o) == $1~
..stuff happens
endif
~

Or am I going about this the wrong way?

[Dalvyn]

You only need 1 tilda per program, at the very end of it.