QGIS » QGIS Application

To correct this bug I have modified the file /usr/share/grass/modules/v.kernel.qgm and changer module="qgis.v.kernel.rast.py" in module="v.kernel".
That's work.
Bests regards.
Didier

We have the same problem for all other .py GRASS scripts. They call --interface description, which is not available for the script (but it is for underlying GRASS module).

Which version of GRASS?

What happens if you run from GRASS shell (GRASS pure shell, not the shell in QGIS) the command:
your-path-where-qgis-is-installed/share/qgis/grass/scripts/qgis.v.kernel.rast.py --interface-description

For me it works with GRASS 6.4.0

With GRASS 6.4.1-1 from Debian sid it does not work, both with v.kernel and for db.connect-login.pg.py

For me
qgis.v.kernel.rast.py --interface-description
works in GRASS shell 6.4.1 compiled from source.

What output you get in GRASS shell?

The output form the shell is ok:

$ qgis.v.kernel.rast.py --interface-description
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE task SYSTEM "grass-interface.dtd">
<task name="qgis.v.kernel.rast.py">
        <description>
                Generates a raster density map from vector points data using a moving 2D isotropic Gaussian kernel.
        </description>
        <keywords>
                vector, export, database
        </keywords>
        <parameter name="input" type="string" required="yes" multiple="no">
                <description>
                        Inserisci il vettore con i punti di controllo
                </description>
                <keydesc>
                        <item order="1">name</item>
                </keydesc>
                <gisprompt age="old" element="vector" prompt="vector" />
        </parameter>
        <parameter name="stddeviation" type="float" required="yes" multiple="no">
                <description>
                        Standard deviation in map units
                </description>
        </parameter>
        <parameter name="output" type="string" required="yes" multiple="no">
                <description>
                        Output raster map
                </description>
                <keydesc>
                        <item order="1">name</item>
                </keydesc>
                <gisprompt age="new" element="cell" prompt="raster" />
        </parameter>
        <flag name="overwrite">
                <description>
                        Permetti al file di output di sovrascrivere file esistenti
                </description>
        </flag>
        <flag name="verbose">
                <description>
                        Verbose module output
                </description>
        </flag>
        <flag name="quiet">
                <description>
                        Quiet module output
                </description>
        </flag>
</task>

Can provide some feedback if it still occurs?

Thanks in advance.