Command Button Invalid Argument

[Novice2000]

Hello,
I am adding s couple of command buttons to a form. These bottons preview
reports and allow the user to see and print them. I add ed the button but
when I go to save it I get a pop-up that says:

Invalid argument

Then when i click off of that I get:
"You tried to commit or roll back a transaction without first beginning a
transaction"

It won't let me save the button. Any ideas would be greatly appreciated.

 

[Doctor]

What is your code for which ever button you are clicking, and the code for
your save button (if not the same)?