Custom Functions using sheet include.

Hi all I have a sheet that I declare my custom functions like a drift calculation for resistors lets call this resistor_calcs, then if I include this sheet in a new worksheet using the include sheet function and try to use the functions in resistor_calcs I get a undefined variable error.

in resistors.mcdx I have

Now in M15 this works fine, so I wanted to ask does prime support user defined functions which are imported using the include sheet directive.

I have tried something really basic also like declaring a function x(b,c):=b+c  and then using x(1,2)=  in the remote worksheet, still this does not work.

I' running Prime 4.0.

Also second note where are the hyperlink insertions in prime.....

Any ideas...