Ardour fails to scan the Amplitube 5 VST3 plugin

#1

Ardour fails to scan the Amplitube 5 VST3 plugin. It is being flagged as ‘erroneous’ during the plugin discovery process.

#2

What OS/platform do you use that plugin on?

Is there any additional information in Ardour Menu > Window > Plugin Manager for this plugin?

#3

OS: Windows 11
Additional information in Ardour Menu > Window > Plugin Manager for this plugin:

VST3 module-path ‘C:\Program Files\Common Files\VST3\AmpliTube 5.vst3\Contents\x86_64-win\AmpliTube 5.vst3’
[Info]: Scanning: C:\Program Files\Common Files\VST3\AmpliTube 5.vst3
[Info]: FactoryInfo: ‘IK Multimedia’ ‘www.IKMultimediaProduction.com’ ‘’
[Info]: Class count: 3
[Info]: Class: 0 ‘AmpliTube 5’ ‘Audio Module Class’
[Info]: VST3: media: kAudio dir: kInput type: kMain n_busses: 1
[Info]: VST3: - bus: 0 count: 2
[Info]: VST3: media: kAudio dir: kInput type: kAux n_busses: 1
[Info]: VST3: media: kAudio dir: kOutput type: kMain n_busses: 1
[Info]: VST3: - bus: 0 count: 2
[Info]: VST3: media: kAudio dir: kOutput type: kAux n_busses: 1
[Info]: VST3: media: kEvent dir: kInput type: kMain n_busses: 1
[Info]: VST3: - bus: 0 count: 16
[Info]: VST3: media: kEvent dir: kOutput type: kMain n_busses: 0
Error: c0000005
—8<—
Backtrace thread: 0
Backtrace frames: 20
17: UnhandledExceptionFilter - 140730723292432
16: strncpy - 140730781433424
15: _C_specific_handler - 140730781145152
14: _chkstk - 140730781425968
13: RtlLocateExtendedFeature - 140730780032528
12: KiUserExceptionDispatcher - 140730781424352
11: ExitDll - 140726817453360
10: ExitDll - 140726817453360
9: ExitDll - 140726817453360
8: ExitDll - 140726817453360
7: ExitDll - 140726817453360
6: ExitDll - 140726817453360
5: ExitDll - 140726817453360
Scan Failed.

#4

Have you tried logging into the IK Product Manager ? Then start Ardour. It may simply need a little license refresh.

Or possibly Antivrus software is stopping the license ?

IK products have caused me grief in other DAW’s as well.

#5

The issue is quite strange. For some time now, the only way I’ve been able to run Amplitube 5 in Ardour is as a VST2 plugin, which works perfectly fine. However, I’d prefer to use the VST3 version if possible, as it is technologically more advanced. In short: since the VST2 version works, I don’t think it’s a licensing issue.

In case it helps anyone familiar with this issue, here is the scan log for the Amplitube 5 VST2 plugin, which is the one that actually works correctly:

[Info]: Scanning: C:\Program Files\VstPlugIns\AmpliTube 5.dll
[Info]: File type: x64 (64-bit)
[Info]: Found Plugin: ‘5btA’ AmpliTube 5
[Info]: Touch cachefile: set mtime = 1770339708 (2026-02-06 01:01:48), plugin mtime = 1765278230 (2025-12-09 11:03:50)
<!-VST2Cache version=“1” binary=“C:\Program Files\VstPlugIns\AmpliTube 5.dll” arch=“x86_64”>
<!-VST2Info id=“1098146357” name=“AmpliTube 5” creator=“IK Multimedia” category=“Effect” version=“” n_inputs=“2” n_outputs=“2” n_midi_inputs=“1” n_midi_outputs=“0” is_instrument=“0” can_process_replace=“1” has_editor=“1”>
<!/VST2Info>
<!/VST2Cache>
[Info]: Saved VST2 plugin cache to C:\Users\pablo\AppData\Local\Ardour9\cache\vst\673d0c33e8ec339a06049fe9eca484c29cd50e1d-x64.v2i

#6

I just checked my Ardour 8.12 on Win10. I get this error shown via the Plugin Manager. My VST3 does not work either.

VST3 module-path 'C:\Program Files\Common Files\VST3\AmpliTube 5.vst3\Contents\x86_64-win\AmpliTube 5.vst3'
[Info]: Scanning: C:\Program Files\Common Files\VST3\AmpliTube 5.vst3
Error: c0000005
 ---8<---
Backtrace thread: 0
Backtrace frames: 9
 6: UnhandledExceptionFilter - 140706218851408
 5: memset - 140706260928000
 4: _C_specific_handler - 140706260831664
 3: _chkstk - 140706260920224
 2: RtlRaiseException - 140706260590800
 1: KiUserExceptionDispatcher - 140706260915104
 0: ExitDll - 140703803156224
Scan Failed.
#7

So the plugin scans correctly, but then crashes when Ardour unloads it at the end.
Strange and hard to say why this happens. Best guess: Ardour’s scanner terminates the plugin scan too quickly before the plugin can do some online license checks or sth; then again the VST2 works.

Before IKmultimedia’s acquisition we had contacts there, and I know that “Amplitube 4” works in Ardour…

#8

Have you tried running Ardour as Administrator?
Error: c0000005 apparently has to do with memory violation, possibly related to NVidia drivers.

You could also try turning off Memory Integrity , as this page suggests
https://www.reddit.com/r/buildapc/comments/15kswc5/the_dreaded_c0000005_error_help_please/

Windows Security Center → Device Security → Core Isolation, and turn off Memory Integrity.

#9

Thanks for the suggestions. I’ve tried running Ardour as Administrator and I also turned off Memory Integrity in the Core Isolation settings, but unfortunately, neither of those fixed the issue. The c0000005
error still persists.

#10

Could we increase the timeout for Ardour’s scanner to give the plugin more time?