>I trace it to a call that puts up a form on screen. I have replaced the from with another one with no luck...This a very simple form that puts up a list of options and an OK button. Would it help if I sent it to you?

Does the form have any data in it? Can you call the form from the command window? When you say you replaced the form with another one, does that mean the second form caused the same error? You can email me the form at fault if you want. Also include your calling syntax.