OK, I accept that it isn' t possible. I 'broke up' the type into its
components to pass it.

NickHK wrote:
I get a compile error on such a set up, as you cannot use user defined types
as arguments or return values in public routine.

Your type is private, so the Update routine cannot see it.
Maybe move to using a Class instead.

NickHK

"RocketMan" wrote in message
oups.com...
I get the compile error: ByRef Argument Type Mismatch
at the line Call Upate(itercount, a(i))

and it doesn't make sense to me. I am passing only one element of an
array and the types seems fine to me.

HELP

Here is the example:

Private type Iteration
Name as string
count as integer
end type

private type j
domain as string
it() as Iteration
end type

public function start()
dim i, itercount as integer
dim a(500) as j
itercount = Worksheet("iters").Range("c1")
for i = 0 to 499
redim a(i).it(itercount ) as Iteration
Call Update(itercount, a(i))
next

end function

' NOTE this function is in a separate ( .xla sheet) Module

Public Function Update(byval icount as long, byref DomIters as j)
' stuff done in here
end function