[Ardour-Users] Ardour 3 Keeps Losing My Regions

[Paul Davis]

On Sat, Jan 18, 2014 at 2:55 PM, S C Rigler <riglersc at gmail.com> wrote:

> Hello,
>
> I'm running Ardour 3.5.143 on Fedora 19 and letting NSM manage my
> sessions.  Occasionally when I go back into a session I'll get a dialog box
> with the following types of complaints:
>
> [ERROR]: Session: XMLNode describing a AudioRegion references an unknown
> source id =550
> [ERROR]: Session: cannot create Region from XML description. Can not load
> state for region 'RhythmGuitar 4-2'
> ...
> [ERROR]: Playlist: cannot create region from XML
> [ERROR]: Session: cannot create Playlist from XML description.
> [ERROR]: Session: XMLNode describing a AudioRegion references an unknown
> source id =478
> ...
> [ERROR]: could not reconstitute StatefulDiffCommand from XMLNode. object
> type = ARDOUR::AudioPlaylist id = 445
> [ERROR]: could not reconstitute StatefulDiffCommand from XMLNode. object
> type = ARDOUR::AudioPlaylist id = 412
>
> Then I'll notice that some of the regions are no longer present.  The wav
> files are still present and can be imported back into the session.  I've
> also noticed this with midi regions as well.
>
> Is it possible this is a side effect of working with NSM?
>

No, it is a serious bug in ardour that so far nobody has found a
reproduceable recipe for. The files are not lost - it typically requires 1
line to be added back to the session file to restore things. It should not
happen, but until we can find a way to reproduceably force it to happen, a
fix will be elusive.
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