My database houses several types of inventory and I will have about 30 employees accessing the db. I'd like to have some of the forms run a macro (that runs several update queries) upon closing. If I add the macro and 2 or 3 (or more) people happen to close the form at the same time, what type of issues will I run into, if any? All of the forms in my database are based on "CurrentUser()". I can't seem to find any answers anywhere online... Any ideas or suggestions would be great!