[GRASS-user] Compiling GRASS GIS on Debian Buster

Vincent Bain bain at toraval.fr
Thu Jul 25 07:30:49 PDT 2019

My self-reply:

sometimes python pip management tool can look tricky to amateurs like
me: a basic "pip install numpy" told me numpy was already installed.
For an effective upgrade of any package one should rather type:

python -m pip install --upgrade SomePackage

(source: python 2.7.16 doc)

Then GRASS starts and runs like a charm!
Hope this helps folks who meet the same issue.


Le jeudi 25 juillet 2019 à 09:26 +0200, Vincent Bain a écrit :
> Hi,
> since I upgraded my Debian system to version 10 (buster), I'm not
> able
> to get GRASS working.
> I pulled the latest version from Git main source code repository. The
> usual compilation process runs apparently fine. When launching
> grass77
> from a terminal, the startup screen appears, and lets me pick
> location/mapset, but when starting GRASS session, the gui can't
> start.
> It throws the following error message:
>    wxnviz.py: This module requires the NumPy module, which could not
> be
>    imported. It probably is not installed [...]
> whereas NumPy is properly installed:
>    pip list | grep numpy
> returns:
>    numpy                              1.12.1   
> Has anyone experienced such issue?
> Thank you,
> Vincent.
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