Invalid Arguement Problem

[main-man]

i have a problem. The access database we use has been working perfectly on a query which asks for a set of dates to be entered. We have recently added more records and since i tried to run the query i get a statement geting back saying "invalid arguement" why is this?

Can someone please help

 

[FoFa]

Just guessing here, but your query may call a function on one of your fields, and that field has not been supplied (NULL) in the new records.