[Qgis-user] Missing vector layers

[Paolo Cavallini]

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Il 05/11/2014 12:16, Robert Beasley ha scritto:
> My 3 year old mapping project used 1.8 on Windows 7 prof. to create
> some 320 vector and raster layers (about 50/50).  It started to
> crash rather frequently - but I never lost data or layers.  I have
> now installed QGIS 2.6 64 bit and find that half the vector layers
> will not display and can see no reason for this as there is no
> difference that I can see between the layers that display and those
> that don't.  If I open the project in version 1.8 now, I find that
> the same vector layers are missing.  Any ideas on how to fix this?

The preferrend procedure is to keep on upgrading the projects from one
version to the next. Ensuring retrocompatibility for -n versions is a
major work, and nobody has come out to do it, or sponsor it.
In your case, most probably is the switch from old to new symbology
that is causing the issue.
I do not see another way than rebuilding the styles with the new
symbology (far more powerful, I'm sure you'll enjoy it).
All the best.

- -- 
Paolo Cavallini - www.faunalia.eu
QGIS & PostGIS courses: http://www.faunalia.eu/training.html
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