Flux IRCAM Verb multiple instances causes Nuendo 12 crash


When using more than one instance of the Flux IRCAM Verb Plugin in a Nuendo 12 session, the session will crash Nuendo 12 after being saved an reopened.

Nuendo does not crash and will continue just fine with several instances of the plugin while working. It will only crash once you have saved your project and want to reopen it, making it difficult to find out what the problem is. You will have to open the project without third party plugins, remove all Flux Verb plugin instances (and replace with another plugin) and save again.

Flux has been notified.


Could you attach the .crash/.ips file, please?

Mac: macOS Console utility > Crash Reports (or ~user/Library/Logs/Diagnostic Reports).
Win: %userprofile%/Documents/Steinberg/Crash Dumps

Hi Martin,
No crash dump files were generated for this issue, sorry.
Nuendo just exits when finishing loading the project with more than one instance of Flux IRCAM Verb.


Are you on Mac or Windows, please?

Win10Pro running Nuendo 12.0.50.
Flux IRCAM Verb v21.12.0.50123. as VST2.4.

On the Flux website they write about plugin versions 23.07.50310, but I can’t access those on the Flux Center download manager.
It says in their release notes for build Verb/Verb Studio Session - Crash when reloading session having 2 instances. So maybe they fixed it and I need to find a way to download the latest versions…


Generate a DMP file and share it via Dropbox or similar service, please.

Use Microsoft ProcDump utility to generate a DMP file, please.

  1. Please download ProcDump64 from Microsoft (~650kB) and extract the archive to a local folder on your harddisk.

  2. Run Command Prompt (cmd) as administrator (right click and select “run as administrator”)

  3. Navigate (in the Command Prompt) to the folder with the extracted procdump file.
    For example:
    cd C:\ Users \ \ Downloads \ Procdump
    Note: the dmp file will be written into that folder.

  4. Launch Cubase/Nuendo. You can work as usual. At any time, change to the command prompt and start procdump, to monitor Cubase/Nuendo for unexpected behavior (see next step).

  5. Launch procdump64 via Command Prompt:
    Cubase 12:
    procdump64 -e -h -t Cubase12

Nuendo 12:
procdump64 -e -h -t Nuendo12

The -h option will write a dmp file in case of an application hang. This might kick in too early sometimes, in case some action takes a little longer. Feel free to skip the “-h” option, if you are only up for fetching crashes.
The option -e will catch exeptions and the option -t terminations of the application.

  1. Prodump is now monitoring the Cubase/Nuendo process and will write a crash log, in case Cubase/Nuendo crashes or hangs. Perform the action that causes Cubase/Nuendo to crash and send us the generated crash dmp.

ZIP and share the DMP file via Dropbox or similar service, please.

Updating (or rather upgrading, as it costs) to version solved this issue.

Yeah, I was having all kinds of issues with Flux plug-ins in Nuendo 12 until I upgraded them last week (during their sale). Now everything runs great.