Hi Niek,

Just to clarify - do you mean essentially change the formular from
Holavail() to Holavail(Range1,Range2)?

Thanks

Andi
"Niek Otten" wrote in message
...
Not easy to understand immediately what you're trying to do, but in
general:

All inputs to the function should be in the argument list. Don't rely on
Application.Volatile.
Excel just doesn't know which cells to recalculate and, more important, in
what sequence, if you don't tell it which cells/ranges the function
depends
on.
There are some descriptions of how Excel tries to find out what extra
cells
to recalculate, but why take the risk? Do the obvious, declare your
arguments and supply them with the function call.

--
Kind regards,

Niek Otten

"Andibevan" wrote in message
...
Hi All,

I have been struggling with the following UDF that I keep nearly get
working
but then it gives up.

It is a stand-alone UDF that needs no variables as it determines the
date
it
should work on from the 2nd row of the column it is called from, and the
name to look up from column A of the row it is called from.

The problem is that it works fine when calculate is hit (F9) from one
worksheet but it only generates #REF! when called (or forced to
calculate
using F9) from another.

I am completely stumped:-

Function HolAvail()

Application.Volatile

On Error GoTo Err:

Dim Var_Name As Range 'Location of Name

Dim Var_Date As Range 'Location of Date

Dim Var_Name_Row As String 'Name row

Dim Var_Date_Column As String 'Date Column

Dim Var_SheetZZ As String ' as worksheets?

Dim STR_RNG_Date As String

Dim STR_RNG_Name As String

Var_SheetZZ = Application.Caller.Parent.Name

Var_Date_Column = Application.Caller.Column 'Column where date is



'Converts Column number into Column Letter

If Var_Date_Column 26 Then

Var_Date_Column = Chr(Int((Var_Date_Column - 1) / 26) + 64) & _

Chr(((Var_Date_Column - 1) Mod 26) + 65)

Else

' Columns A-Z

Var_Date_Column = Chr(Var_Date_Column + 64)

End If





Var_Name_Row = Application.Caller.Row 'Row where name is



Set Var_Date = Range(Var_Date_Column & "2")

Set Var_Name = Range("A" & Var_Name_Row)



STR_RNG_Name = "'" & Var_SheetZZ & "'!" & Var_Name.Address

STR_RNG_Date = "'" & Var_SheetZZ & "'!" & Var_Date.Address



HolAvail = Evaluate("SUMPRODUCT((" & STR_RNG_Date & _

"=Hol_Start)*(" & STR_RNG_Date & _

"<=Hol_End)*(" & STR_RNG_Name & _

"=Hol_Name)*(Hol_Type_Code))")





If (Evaluate("SUMPRODUCT((" & STR_RNG_Date & _

"=Hol_Start)*(" & STR_RNG_Date & _

"<=Hol_End)*( Hol_Name =""Public
Holiday"")*(Hol_Type_Code))"))

= 2 Then



HolAvail = 2

Else

HolAvail = HolAvail

End If



'Workdays are Blank

HolAvail = IIf(HolAvail = 0, "", HolAvail)



'Weekends are W (Weekdays 7 & 1)

HolAvail = IIf((Weekday(Var_Date) = 7) Or (Weekday(Var_Date) = 1), _

"W", HolAvail)

Err:

'HolAvail = ""

HolAvail = "E"

End Function