Hi Marrick,
OK, but that's not the "subscript out of range" error you originally mentioned. From my testing error 4198 appears to occur when you try to use OrganizerCopy to copy one of Word's builtin Styles. If you're happy not to work with them, you could modify the PopulateSourceList sub by adding an If test to your 'For Each aStyle In ActiveDocument.Styles' loop, thus:
Code:
For Each aStyle In ActiveDocument.Styles
If aStyle.BuiltIn = False Then
ListBox1.AddItem (aStyle)
CountSourceStyles = CountSourceStyles + 1
lblSourceCount.Caption = "(" & CountSourceStyles & ")"
End If
Next aStyle