$shipping_num_boxes Problem with custom shipping module

[RodG]

Thanks for the info.
Admin>Configuration>Shipping/Packaging is presumadly where your speaking of.
Enter the Maximum Package Weight you will ship.

Yes, that's the one.

All items have been entered in kilos ie 0.1 etc.

Technically, any values you enter are nothing more than 'numbers'. What those numbers signify is determined by the various shipping modules.

Is there any way to work out if a shipping module is configured to use grams or kg at all?

I suppose you could 'work it out' by looking at the code of the various shipping modules that you intend to use, but I've generally found that reading any documentation that is supplied with the module(s) is usually a lot easier.

Cheers
Rod