[Qgis-user] Raster -> Merge (gdal_merge) failure

[Ramon Andinach]

On 18/06/2011, at 16:42 , Nick Hopton wrote:

> I am running QGIS 1.7 under Ubuntu 11.04 and I can no longer merge
> rasters by going 'Raster -> Merge'. This was possible in QGIS 1.6, but
> not in QGIS 1.8 or now, after I have dropped back to Version 1.7. The
> process fails with the error message 'The process crashed some time
> after starting successfully.' However, other Gdal tools, for example,
> 'Raster -> Warp' and 'Raster -> Transform' do work. gdal_merge.py will
> not run from a terminal either.
> 
> I have tried completely removing QGIS and reinstalling, but to no
> effect. One odd thing though, after 'completely removing' QGIS and
> reinstalling it I was surprised to find that my old settings were
> still in place.
> 
> Where, by default, does QGIS install Gdal tools, by the way?


Hi Nick,

QGIS (or at least my installs) seem to have an interesting idea of unistall sometimes.

In your home directory there's a directory, .qgis
Your defaults and the plugins are installed there. So if you want to do a full uninstall and not have your defaults retained - you'll need to trash that directory too.

Out of curiosity: 
1. Does the plugin make anything make anything?
2. When you use the Raster -> Merge it shows you what it's doing by making a command line script and showing it in the dialogue box. If you copy that onto the command line, does that work?
3. (and this is probably the important curiosity) what version of GDAL is your copy of QGIS 1.7 compiled against (use something like Help -> About QGIS)?

-ramon.