Expression Question

pinbot

I'm passing a datetime to a stored procedure.

Trying to format the expression to pass the current date - 1 month.

When I set the expression to:

[AddMonths([Date],-1)]

I get the following errors in my parameter:

pinbot

Nevermind.

Writing it this way works: AddMonths([Date],-1)

When I double-clicked on the "AddMonths" function from the list it inserted:
[AddMonths(,)]

So I figured it needed the outer brackets.