Scaler 3.2 is crashing Reaper (v7.53) on Windows 10.
It craches even if I load it into an empty project.
Standalone version works.
How do I re-install Scaler 3.1 while you fix this?
(I know you should not ever install new version while working on a project)
Hi @Ste ,
I also have Reaper 7.53 / Scaler 3.2, but on Win 11.
Did you do the clean install of Scaler 3.2? I intentionally did not do it in order to see if there will be problems, but there was none so far. Maybe this could fix the issue.
Also, can you provide the error message from Event Viewer for the event that caused crash?
Thanks
Thanks @Miki, But I tried with a clean install. Deleted the âScaler 3.settingsâ and Uninstalled /installed Scaler.
Here is 2 error messages; (Is this correct info?)
Loggnamn: Application
KĂ€lla: Application Error
Datum: 2025-11-19 00:47:50
HĂ€ndelse-ID: 1000
Aktivitetskategori:(100)
NivÄ: Fel
Nyckelord: Klassiskt
AnvÀndare: Saknas
Dator: Benito6-Studio
Beskrivning:
Felet uppstod i programmet med namn: reaper.exe, version 7.5.3.0, tidsstÀmpel 0x691357a5
, felet uppstod i modulen med namn: USER32.dll, version 10.0.19041.6456, tidsstÀmpel 0x5094b343
Undantagskod: 0xc000041d
Felförskjutning: 0x000000000000d80f
Process-ID: 0x47fc
Programmets starttid: 0x01dc58e5b2ab4d30
SökvÀg till program: C:\Program Files\REAPER (x64)\reaper.exe
SökvÀg till modul: C:\WINDOWS\System32\USER32.dll
Rapport-ID: aa894d31-90ac-4e1a-9e6f-06efca3bf964
FullstÀndigt namn pÄ felaktigt paket:
Program-ID relativt till felaktigt paket:
HĂ€ndelsens XML-data:
1000
0
2
100
0
0x80000000000000
122310
Application
Benito6-Studio
reaper.exe
7.5.3.0
691357a5
USER32.dll
10.0.19041.6456
5094b343
c000041d
000000000000d80f
47fc
01dc58e5b2ab4d30
C:\Program Files\REAPER (x64)\reaper.exe
C:\WINDOWS\System32\USER32.dll
aa894d31-90ac-4e1a-9e6f-06efca3bf964
Loggnamn: Application
KĂ€lla: Application Hang
Datum: 2025-11-19 00:45:20
HĂ€ndelse-ID: 1002
Aktivitetskategori:(101)
NivÄ: Fel
Nyckelord: Klassiskt
AnvÀndare: Saknas
Dator: Benito6-Studio
Beskrivning:
Programmet Scaler 3.exe, version 3.2.0.0 avslutades eftersom det slutade samverka med Windows. Ytterligare information om problemet kan finnas i problemhistoriken i SÀkerhet och underhÄll pÄ Kontrollpanelen.
Process-ID: 4900
Starttid: 01dc58e3bf240230
Avslutningstid: 24
ProgramsökvÀg: C:\Program Files\Scaler Music\Scaler 3\Scaler 3.exe
Rapport-ID: 67048c66-3223-4709-bb5c-09f2008ad938
FullstÀndigt namn pÄ felaktigt paket:
Program-ID relativt till felaktigt paket:
Typ av lÄsning: Cross-thread
HĂ€ndelsens XML-data:
1002
0
2
101
0
0x80000000000000
122309
Application
Benito6-Studio
Scaler 3.exe
3.2.0.0
4900
01dc58e3bf240230
24
C:\Program Files\Scaler Music\Scaler 3\Scaler 3.exe
67048c66-3223-4709-bb5c-09f2008ad938
Cross-thread
430072006F00730073002D0074006800720065006100640000000000
Loggnamn: Application
KĂ€lla: Application Hang
Datum: 2025-11-19 00:45:20
HĂ€ndelse-ID: 1002
Aktivitetskategori:(101)
NivÄ: Fel
Nyckelord: Klassiskt
AnvÀndare: Saknas
Dator: Benito6-Studio
Beskrivning:
Programmet Scaler 3.exe, version 3.2.0.0 avslutades eftersom det slutade samverka med Windows. Ytterligare information om problemet kan finnas i problemhistoriken i SÀkerhet och underhÄll pÄ Kontrollpanelen.
Process-ID: 4900
Starttid: 01dc58e3bf240230
Avslutningstid: 24
ProgramsökvÀg: C:\Program Files\Scaler Music\Scaler 3\Scaler 3.exe
Rapport-ID: 67048c66-3223-4709-bb5c-09f2008ad938
FullstÀndigt namn pÄ felaktigt paket:
Program-ID relativt till felaktigt paket:
Typ av lÄsning: Cross-thread
HĂ€ndelsens XML-data:
1002
0
2
101
0
0x80000000000000
122309
Application
Benito6-Studio
Scaler 3.exe
3.2.0.0
4900
01dc58e3bf240230
24
C:\Program Files\Scaler Music\Scaler 3\Scaler 3.exe
67048c66-3223-4709-bb5c-09f2008ad938
Cross-thread
430072006F00730073002D0074006800720065006100640000000000
Thanks for the log @Ste.
There is something strange.
I would expect to find Scaler 3.vst (or Scaler 3.vst3), but I see Scaler3.exe, which is standalone.
I leave this to @Steven or @Tristan with a free translation from Swedish 
.
Log Name: Application
Source: Application Error
Date: 2025-11-19 00:47:50
Event ID: 1000
Activity Category:(100)
Level: Error
Keywords: Classic
User: Missing
Computer: Benito6-Studio
Description:
The error occurred in the program named: reaper.exe, version 7.5.3.0, timestamp 0x691357a5
, the error occurred in the module named: USER32.dll, version 10.0.19041.6456, timestamp 0x5094b343
Exception Code: 0xc000041d
Error Offset: 0x000000000000d80f
Process ID: 0x47fc
Program Start Time: 0x01dc58e5b2ab4d30
Application Path: C:\Program Files\REAPER (x64)\reaper.exe
Module Path: C:\WINDOWS\System32\USER32.dll
Report ID: aa894d31-90ac-4e1a-9e6f-06efca3bf964
Full Name of Faulting Package:
Application ID Relative to Faulting Package:
Event XML Data:
1002
0
2
101
0
0x80000000000000
122309
Application
Benito6-Studio
Scaler 3.exe
3.2.0.0
4900
01dc58e3bf240230
24
C:\Program Files\Scaler Music\Scaler 3\Scaler 3.exe
67048c66-3223-4709-bb5c-09f2008ad938
Cross-thread
430072006F00730073002D0074006800720065006100640000000000
Hi @Ste, sorry to hear about the crash, and thanks for providing the report. Weâve passed this on to the dev team.
@Miki thanks for your help and translation
Thanks @steven for taking care of this. And I shall thank Google translate because I donât understand Swedish, except âHejâ but this is thanks to their famous furniture company 
Windows 11 24H2 build 26100.7171
Reaper 7.53
Scaler 3.2
Scaler 3.2 causes consistent âhangsâ when loading as part of a Reaper project.
Reaper is able to load the project in recovery mode (with all effects and instruments offline) but when I attempt to bring Scaler3 back on line within a track, Reaper hangs (spinning circle) and is totally unresponsive.
I waited 30 minutes but Reaper fails to respond (shows a consistent 6% CPU usage).
Reaper has to be killed with Task Manager.
The only way to recover the project is to load Reaper with FX offline, then delete the track containing Scaler 3.2, losing all work done within Scaler on that track. 
Itâs important to note that bug occurs when the project is loaded from disk. While the project is being created and worked on, Scaler works OK. The problem occurs when a saved project containing a Scaler 3.2 session is loaded.
In its current state, I donât trust Scaler enough to use with confidence. The âsave oftenâ maxim doesnât apply here, as the problem manifests when you try to load a Reaper project with Scaler 3.2 on a track.
EventViewer logs this:
The program reaper.exe version 7.5.3.0 stopped interacting with Windows and was closed. To see if more information about the problem is available, check the problem history in the Security and Maintenance control panel.
Event viewer logs this when Reaper hangs
Fault bucket 2072707980255898245, type 5
Event Name: AppHangB1
Response: Not available
Cab Id: 0
Problem signature:
P1: reaper.exe
P2: 7.5.3.0
P3: 691357a5
P4: e898
P5: 67247104
P6:
P7:
P8:
P9:
P10:
Attached files:
\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.f3ea8d1c-3b11-46b2-8403-12655307eb4c.tmp.WERInternalMetadata.xml
These files may be available here:
\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\Critical_reaper.exe_301d3719ed771e096164cad53532edecb19bbe_77a7ec93_6c635010-260e-4c96-9328-e607bfafc02f
Analysis symbol:
Rechecking for solution: 0
Report Id: 8d7e837d-5934-4778-9ed5-df9b253dfb7c
Report Status: 268435456
Hashed bucket: 6baaf810bc39348cfcc3bced26452a85
Cab Guid: 0
Thanks for this, we have another similar report from another Reaper user so this will help our developers. Looking into this.
Hi Davide â same issue I think on Studio One Version 7.2
I will second this issue in Studio One 7.2. It worked the first time I used it but not after it was saved in a project and that project was re-opened.
âpmnâ who describes the bug exactly as I experienced it. Iâm running Reaper 7.56 on Win 10. Everything works, (even a complex setup loading multiple VSTs in both Scaler and Reaper) except whenever I save a project, (even a bare bones simple on) if I try to open it it locks up Reaper completely, reporting 6% CPU usage. Although it doesnât report as ânot repondingâ the only solution is to kill Reaper with the task manager.
Yes, this is what was happening on my Studio One as noted in this post - Scaler 3.2 plugin freezes, Studio One (latest version) - Windows 11 - Scaler 3 Support / Bug Reports - Scaler Music - Community Forum
Is this related to a fix we have found here: Scaler 3.2 is crashing my Studio One 7.2.3 while opening projects - #13 by Philippe1977
@Steven Worth sending the beta to whomever itâs relevant for in this thread?
Hi Davide, thanks for referencing this. I see in that other thread it was for Mac version of Scaler, my issue was with Windows. I donât know if that has any bearing on it. As a side note, I have not used it in that fashion (in the DAW) since then, however I have now upgraded to the new Fender Studio Pro so I have that on my system as well. Iâd be willing to try a Windows beta version if you had one.
Dan
Thanks @Whatamint - Iâve sent you a DM with the Windows beta.
If anyone else would like to test the beta, feel free to DM me with your OS.
Similar issue here, with latest Windows / Reaper / Scaler. Duplicating a track with Scaler appears to instantly trigger the bug, where Reaper and Scaler become unresponsive and the only thing I can do is End Task through Task Manager, and thereafter any attempt to load the project (without the duplicated track, since it couldnât be saved) results in a hang, even after a reboot.
Iâve been using the beta every day now for a week or so, and Iâve had no new hangs related to Scaler. Tracks that hung with the previous version are not fixed, and if I enable the Scaler beta on one of those it will hang every time, so that work is probably lost, but so far no problems with any new tracks.
Hi @marad, thanks for the update - Iâll pass on your feedback to our dev team. Cheers!