Hi Steven, Thanks for the reply. I should of said that this was in version 3.70 although the functionality seems more or less the same in version 4.00. No the complaining message seems to be against the mandatory dimension being offset against an item. Choosing “By Dimensions” on the Options tab of the Calculate Inventory does seem to go some way to attaching local dimensions to the Item Journal Lines but this doesn’t always apply! Thanks for your help. Cheers David