Hi Karsten,
thanks again for your help. I have installed the node as per your instructions and it works.
The reason I wanted it was to automate the array layout of a selected object within a given
rectangular area. (basically what you helped me with before)
With the Maths nodes I can do the calcs based on the given area and the selected item's
bounding box dimensions. The only thing that doesn't happen if I add a rotate node to the item
it does not update the bounding box.(the selected stays where it is but grayed out)
Anyway as it is now you can set your area select an item add a gap and it will automatically
fill the area with rows and columns. I will post the result when I get it working.
Thanks again.

Barry.