invalid procedure call or argument?

whenever i try to run a second instance of my App i get this error

mycode is:

VB Code:

Let App.Title = App.Title & " V" & App.Major & "." & App.Minor & "." & App.Revision
    Let Caption = App.Title
    
    If App.PrevInstance Then
        Call AppActivate(App.Title)
        Call Unload(Me)
        Exit Sub
    End If

its the appactive function nyone kno whats wrong?

Maybe it is because there are two programs with the same caption.
Try to change your caption, so there will only be one program with the same caption.

eg

Code:

---

App.Title = App.Title & " V" & App.Major & "." & App.Minor & "." & App.Revision
Caption = App.Title

If App.PrevInstance Then
    Me.Caption = "Closing.."
    Call AppActivate(App.Title)
    Call Unload(Me)
    Exit Sub
End If

---

i cant get my previous app get focus can any help?

Are you sure that your previous application has the same windowcaption as the argument you pass to AppActivate?
I noticed that AppActivate produces the 'invalid procedure call or argument' error when no window is found with that caption.
Do you change the window's caption somewhere else in your code?

it dint give the error anymore it just doesnt give focus to my previous app