Would inserting an invisible, exclude from count bar line help?
!NoteWorthyComposerClip(2.5,Single)
|PerformanceStyle|Style:Legato|Pos:0|Visibility:Never
|Clef|Type:Treble
|Key|Signature:F#|Tonic:G
|TimeSig|Signature:6/8
|Tempo|Tempo:60|Pos:10
|Note|Dur:8th|Pos:-4
|Bar
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-4|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-7|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-4|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-3|Opts:Stem=Up,Beam=End
|Bar|XBarCnt:Y|Visibility:Never
|Note|Dur:16th|Pos:0|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-5|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:1|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:0|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=End
|Bar
!NoteWorthyComposerClip-End