Try this:!NoteWorthyComposerClip(2.0,Single)
|Chord|Dur:4th|Pos:2|Opts:Stem=Up|Dur2:4th,Dotted|Pos2:-2,0
|Rest|Dur:8th|Opts:Stem=Up
!NoteWorthyComposerClip-End
As William says, voices cannot cross. You might try one of these:!NoteWorthyComposer(2.0)
|AddStaff
|StaffProperties|EndingBar:Open (hidden)|Layer:Y
|StaffProperties|Muted:N|Volume:127|StereoPan:64|Channel:1
|Chord|Dur:4th,Dotted|Pos:-4,3|Opts:Stem=Down
|Chord|Dur:4th,Dotted|Pos:-4,3|Opts:Stem=Down
|Chord|Dur:4th,Dotted|Pos:-4,3|Opts:Stem=Down,XNoteSpace=1
|AddStaff
|StaffProperties|EndingBar:Open (hidden)
|StaffProperties|Muted:N|Volume:-1|StereoPan:-1|Channel:1
|Note|Dur:4th|Pos:0|Opts:Stem=Up
|Rest|Dur:8th
|Note|Dur:4th|Pos:0|Opts:Stem=Up,XNoteSpace=1
|Rest|Dur:8th
|Note|Dur:4th|Pos:0|Opts:Stem=Up
|Rest|Dur:8th
!NoteWorthyComposer-End