Ci riprovo. Non riesco a lanciare i comandi Grass da Qgis.
Ho disinstallato Qgis 2.18.2, pulito con Ccleaner, eliminato i file di qgis in giro e reinstallato da locale qgis 2.14. Stesso errore. Provo a cambiare la directory, come da figura, ma stesso risultato
"This also started happening to me after upgrading to 2.18.2. If
you open QGIS in the command line, then try to run a GRASS tool from
Processing, you will probably see a message saying that it couldn't find
Because you're using ubuntugis-unstable, you probably have GRASS 7.2, so this should be the reason fro the error.
Switching from ubuntugis-unstable to ubuntugis-stable, which has GRASS 7.0, did the trick for me.
Not sure if there is another way to fix this while using ubuntugis-unstable / GRASS 7.2, without compiling QGIS from source.
Any ideas ?"
"More on the same:
After the recent GRASS update, the GRASS modules in Processing
Toolbox no longer worked, giving the error "cannot find grass". My
work around is to set a softlink:
sudo ln -s /usr/bin/grass72 /usr/bin/grass70
Then the GRASS modules work.
There used to be a Processing configuration option to set the path
for different modules. But that seems to be gone now?? So is
Processing checking for the GRASS startup script hardcoded to
/usr/bin/grass70? How can I change that?"