I have a very strange error: ???
(attempt to perform arithmetic on local 'shipmentsTotal' (a nil value))
The reason it is strange is - the saved variables are all correct and the add on is correctly displaying the information.
Therefore (shipmentsTotal) is not nil as it has saved correctly to saved variables and the arithmetic is working as the new saved variable is correct and so is the Information printed in the add on.
Any ideas or assistance would be greatly appreciated.
For future reference, in order for people to help you, they need to see your code. No one here is psychic. ;) If an error message says that something is nil, then it most definitely, for some reason, is in fact nil when that error happened.