I want to convert the values in that field to a multi-select lookup to table Z and put them into a field in table B.

Because this need happens several times, I'm trying to write a function to do this.

I've written the function to return the result of the conversion. The function returns a value of type list.

But when I try to assign the value returned by the function to the field in table B, the compiler says I need to have a value of type BIGINTLIST.

How can I make my function return a value of BIGINTLIST?

That isn't a possible function type.

Alex