I believe you can only have the function operate on one column, so add
together 4 sumproducts (one for each of you columns).

"Steved" wrote:

Hello from Steved

Below is fine for D4:D109 but if I change it to D4:G109 it shows #VALUE!
My objective is to sum the extra 3 columns.
What is required please to have it working.

=SUMPRODUCT(--('Planned Kilometres'!$A$4:$A$109=1),--('Planned
Kilometres'!$B$4:$B$109="P"),'Planned Kilometres'!D4:D109)

Thankyou.