[Ardour-Users] Harrisson mixbus plug-ins and Ardour 4.4 ?

[Robin Gareus]

> On Oct 30, 2015, at 10:35 PM, Edward Diehl <diehl at umich.edu> wrote:
> 
> I thought I'd investigate this.   On my system the Mixbus plugins are in /opt/Mixbus-3.0.2257/lib/LV2 so I copied them to /usr/lib/lv2 so Ardour would detect them.   Actually, I had had some earlier versions of the Mixbus plugins in /usr/lib/lv2 so I deleted them.   Somehow in all of this I did something horribly wrong to the lv2 directory so that now every program which scans /usr/lib/lv2 crashes.  This includes ardour, mixbus, carla, and qtractor.    The message ardour gives is:
> 
> canning folders for bundled LV2s: /opt/ardour4/lib/LV2
> Set cursor set to default
> BDB0060 PANIC: fatal region error detected; run recovery
> Segmentation fault
> 
> carla gives a similar message:
> BDB0060 PANIC: fatal region error detected; run recovery
> cannot open DB environment: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery
> Segmentation fault
> 
> ​I have not clue what I did or how to recover from this problem.  I moved the original /usr/lib/lv2 directory and made an empty one, but I still get this error.   Any ideas how to fix this error?
> 
> thanks, Edward Diehl
> 

Likely completely unrelated. jack1 is using Berkeley database (BDB) for metadata, and this smells like jacks database got corrupted.
delete the file, it's called  "metadata.db" and usually in jack's user dir in /tmp/

HTH,
robin