Error displaying bar if it contains a tied note that started in the previous bar

[ldupoueyUB]

Hi,
The title pretty much sums up the issue.
I'm display bars one at a time using Setting.display.startBar = nand Setting.display.barCount = 1 and it works well unless the bar contains a tied note that starts the bar before (which is not displayed but still loaded as I undestand). Maybe the error is a bit different but that's what I deduced.

Using firefox I get this error :

[AlphaTab][Worker] An unexpected error occurred in worker TypeError: can't access property "staff", startNoteRenderer is null
    doLayout https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:53165
    _finalizeTies https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:54529
    finalizeRenderer https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:54549
    finalizeStaff https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:56510
    _finalizeTrackGroups https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:57514
    finalizeSystem https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:57485
    _fitSystem https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:58325
    _layoutAndRenderScore https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:58292
    doLayoutAndRender https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:58097
    layoutAndRender https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:57663
    _layoutAndRender https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:40777
    render https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:40756
    renderScore https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:40702
    _renderMultiple https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:50201
    _handleMessage https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:50186
    AlphaTabWebWorker https://cdn.jsdelivr.net/npm/@coderline/alphatab@latest/dist/alphaTab.js:50125
alphaTab.js:1669:12

Attached is one file I get the issue with (bar 12 for instance)
4 Non Blondes - What's Up (3).gp4.zip

Am I missing something ? Let me know if I should create an issue or anything.

Léo

[ldupoueyUB]

A workaround I found is removing the tied notes but I wish there were a better solution

function removeTiedNotes(bar){
        
        for(beat of bar.voices[0].beats){
          console.log(beat)
          tiedNotes = []
          for(note of  beat.notes){
            if(
              note.isHammerPullDestination ||
              note.isSlurDestination ||
              note.isTieDestination ||
              note.isEffectSlurDestination 
            ){
              tiedNotes.push(note)
            }
          }
          tiedNotes.forEach(note => {
            beat.removeNote(note)
          });
        }
        bar.finish(null)
      }

[AvaTheArchitect]

Hey Leo, question can you take any pictures or share a video with the tie-note issues? I am working on a ticket with tie-notes as well. Not sure if it is related but wanted to compare to yours. For mine it appears related to using SongBook. Thanks

…

On Wed, Jun 3, 2026 at 2:53 AM ldupoueyUB ***@***.***> wrote: Hi, The title pretty much sums up the issue. I'm display bars one at a time using Setting.display.startBar = nand Setting.display.barCount = 1 and it works well unless the bar contains a tied note that starts the bar before (which is not displayed but still loaded as I undestand). Maybe the error is a bit different but that's what I deduced. Using firefox I get this error : [AlphaTab][Worker] An unexpected error occurred in worker TypeError: can't access property "staff", startNoteRenderer is null doLayout ***@***.******@***.***/dist/alphaTab.js:53165 _finalizeTies ***@***.******@***.***/dist/alphaTab.js:54529 finalizeRenderer ***@***.******@***.***/dist/alphaTab.js:54549 finalizeStaff ***@***.******@***.***/dist/alphaTab.js:56510 _finalizeTrackGroups ***@***.******@***.***/dist/alphaTab.js:57514 finalizeSystem ***@***.******@***.***/dist/alphaTab.js:57485 _fitSystem ***@***.******@***.***/dist/alphaTab.js:58325 _layoutAndRenderScore ***@***.******@***.***/dist/alphaTab.js:58292 doLayoutAndRender ***@***.******@***.***/dist/alphaTab.js:58097 layoutAndRender ***@***.******@***.***/dist/alphaTab.js:57663 _layoutAndRender ***@***.******@***.***/dist/alphaTab.js:40777 render ***@***.******@***.***/dist/alphaTab.js:40756 renderScore ***@***.******@***.***/dist/alphaTab.js:40702 _renderMultiple ***@***.******@***.***/dist/alphaTab.js:50201 _handleMessage ***@***.******@***.***/dist/alphaTab.js:50186 AlphaTabWebWorker ***@***.******@***.***/dist/alphaTab.js:50125 alphaTab.js:1669:12 Attached is one file I get the issue with (bar 12 for instance) 4 Non Blondes - What's Up (3).gp4.zip <https://github.com/user-attachments/files/28545530/4.Non.Blondes.-.What.s.Up.3.gp4.zip> Am I missing something ? Let me know if I should create an issue or anything. Léo — Reply to this email directly, view it on GitHub <#2729?email_source=notifications&email_token=BNLESQAWHG4BJQKLMFSBVRL457YRBA5CNFSNUABBM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63RPGEYDCOBZG44DJJTSMVQXG33OVJZXKYTTMNZGSYTFMSSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BNLESQEKF637JCGWYFJX44L457YRBAVCNFSM6AAAAACZYO5PDKVHI2DSMVQWIX3LMV43GRDJONRXK43TNFXW4OZRGAYTQOJXHA2A> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[ldupoueyUB]

Hi,
Not much to show since the score wont even render but here's the score which helped me identify the issue (here opened in musescore 4)

[ldupoueyUB]

Bar 17 renders fine but Bar 18 can't be rendered if previous bar is not rendered

[ldupoueyUB]

You can see the app failing here

But for now removing the destination notes works well enough (see here)

[ldupoueyUB]

And for completeness here are bars 17 and 18 rendering fine together