On Fri, 22 May 2026, Riccardo (Jack) Lucchetti forwarded this from

Artur Tarassow:

I've encountered what appears to be a bug (or unsupported feature)

when using lag specifications with the "to" keyword inside functions

when referring to a passed list parameter.

The following code produces an error: "The symbol 'to' is undefined"

<hansl>

set verbose off

open denmark.gdt --quiet

function void foo(list D)

list L = LRM D.LRM(-1)

L += D.LRM(-2 to -4) # Error: "The symbol 'to' is undefined"

end function

foo(dataset)

</>

I'd prefer to think of this as an "unsupported feature" ;-)

But, anyway, it's now supported in git master.