[GRASS-dev] Problem starting Grass 7.8.6 on Ubuntu

Robert_Lagace3 · November 24, 2021, 12:32pm

I have a problem starting 7.8.6 on Ubuntu 18.04.6 LTS. It may be a bug or a problem related to the Python or wxPython Version.

After defining a location which create the appropriate files and the permanent data set, I get the following message when i hit the "Start" buttom :

Démarrage du SIG GRASS ...
Nettoyage des fichiers temporaires ...

       \_\_\_\_\_\_\_\_\_\_  \_\_\_   \_\_\_\_\_\_\_\_\_\_    \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
      / \_\_\_\_/ \_\_ \\/   | / \_\_\_/ \_\_\_/   / \_\_\_\_/  \_/ \_\_\_/
     / / \_\_/ /\_/ / /| | \\\_\_ \\\\\_  \\   / / \_\_ / / \\\_\_ \\
    / /\_/ / \_, \_/ \_\_\_ |\_\_\_/ /\_\_/ /  / /\_/ // / \_\_\_/ /
    \\\_\_\_\_/\_/ |\_/\_/  |\_/\_\_\_\_/\_\_\_\_/   \\\_\_\_\_/\_\_\_//\_\_\_\_/

Bienvenue dans le SIG GRASS 7.8.6
Page d'accueil du SIG GRASS : https://grass.osgeo.org
Cette version fonctionne avec : Bash Shell (/bin/bash)
L'aide est disponible par la commande : g.manual -i
Voir les termes de la licence avec : g.version -c
Voir les termes de la licence avec : g.version -x
Si requis, redémarrer l'interface graphique avec :g.gui wxpython
Lors prêt pour la fermeture entrer : exit

Lancement de l'interface graphique <wxpython> en tâche de fond, merci de patienter ...
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

GRASS 7.8.6 (L_MTM_7):~ > Traceback (most recent call last):
File "/usr/lib/grass78/gui/wxpython/wxgui.py", line 106, in OnInit
workspace=self.workspaceFile)
File "/usr/lib/grass78/gui/wxpython/lmgr/frame.py", line 129, in __init__
self._menuTreeBuilder = LayerManagerMenuData(message_handler=add_menu_error)
File "/usr/lib/grass78/gui/wxpython/lmgr/menudata.py", line 42, in __init__
message_handler=message_handler)
File "/usr/lib/grass78/gui/wxpython/core/menutree.py", line 71, in __init__
xmlTree = etree.parse(filename)
File "/usr/lib/python3.6/xml/etree/ElementTree.py", line 1196, in parse
tree.parse(source, parser)
File "/usr/lib/python3.6/xml/etree/ElementTree.py", line 597, in parse
self._root = parser._parse_whole(source)
xml.etree.ElementTree.ParseError: no element found: line 1, column 0
OnInit returned false, exiting...

I did not have this problem with the previous version.

I also try to start on a previous data set and get the same message.

Thanks

--
-----------
Robert Lagacé, ing., agr., prof.titulaire
Département de SGA
2425 de l'agriculture
Université Laval
Québec, Québec, G1V 0A6
courriel : robert.lagace@fsaa.ulaval.ca<mailto:robert.lagace@fsaa.ulaval.ca>
tél: (418)-656-2131 poste 402276
fax : (418)-656-3723

Robert_Lagace3 · November 30, 2021, 1:37pm

I found and solved the problem.

Adding a "print" statement before the offending line, I found the problem.

GRAAS was trying to read the file "menudata.xml" in "~/.grass7/toolboxes/" which was empty. I deletes the ~/.grass7 directory. When starting a new GRASS session, it creates a new directory without any file in the toolboxes directory.

GRASS has no instructions for dealing with a empty file.

Those files in the "toolboxes" directory are for menu customisation. They were probably create from a previous GRASS version.

Le 2021-11-24 à 07 h 32, Robert Lagacé a écrit :

I have a problem starting 7.8.6 on Ubuntu 18.04.6 LTS. It may be a bug or a problem related to the Python or wxPython Version.

After defining a location which create the appropriate files and the permanent data set, I get the following message when i hit the "Start" buttom :

Démarrage du SIG GRASS ...
Nettoyage des fichiers temporaires ...
      \_\_\_\_\_\_\_\_\_\_  \_\_\_   \_\_\_\_\_\_\_\_\_\_    \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
     / \_\_\_\_/ \_\_ \\/   | / \_\_\_/ \_\_\_/   / \_\_\_\_/  \_/ \_\_\_/
    / / \_\_/ /\_/ / /| | \\\_\_ \\\\\_  \\   / / \_\_ / / \\\_\_ \\
   / /\_/ / \_, \_/ \_\_\_ |\_\_\_/ /\_\_/ /  / /\_/ // / \_\_\_/ /
   \\\_\_\_\_/\_/ |\_/\_/  |\_/\_\_\_\_/\_\_\_\_/   \\\_\_\_\_/\_\_\_//\_\_\_\_/
Bienvenue dans le SIG GRASS 7.8.6
Page d'accueil du SIG GRASS : https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgrass.osgeo.org%2F&data=04|01|robert.lagace%40fsaa.ulaval.ca|517100dd8ca44532555c08d9af467aff|56778bd56a3f4bd3a26593163e4d5bfe|1|0|637733539943411143|Unknown|TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D|3000&sdata=HK3B4TpoJZB%2FIKVy3JSqIV1f1qF3j2xAZjvZLAEgcPE%3D&reserved=0
Cette version fonctionne avec : Bash Shell (/bin/bash)
L'aide est disponible par la commande : g.manual -i
Voir les termes de la licence avec : g.version -c
Voir les termes de la licence avec : g.version -x
Si requis, redémarrer l'interface graphique avec :g.gui wxpython
Lors prêt pour la fermeture entrer : exit

Lancement de l'interface graphique <wxpython> en tâche de fond, merci de patienter ...
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

GRASS 7.8.6 (L_MTM_7):~ > Traceback (most recent call last):
File "/usr/lib/grass78/gui/wxpython/wxgui.py", line 106, in OnInit
workspace=self.workspaceFile)
File "/usr/lib/grass78/gui/wxpython/lmgr/frame.py", line 129, in __init__
self._menuTreeBuilder = LayerManagerMenuData(message_handler=add_menu_error)
File "/usr/lib/grass78/gui/wxpython/lmgr/menudata.py", line 42, in __init__
message_handler=message_handler)
File "/usr/lib/grass78/gui/wxpython/core/menutree.py", line 71, in __init__
xmlTree = etree.parse(filename)
File "/usr/lib/python3.6/xml/etree/ElementTree.py", line 1196, in parse
tree.parse(source, parser)
File "/usr/lib/python3.6/xml/etree/ElementTree.py", line 597, in parse
self._root = parser._parse_whole(source)
xml.etree.ElementTree.ParseError: no element found: line 1, column 0
OnInit returned false, exiting...

I did not have this problem with the previous version.

I also try to start on a previous data set and get the same message.

Thanks

--
-----------
Robert Lagacé, ing., agr., prof.titulaire
Département de SGA
2425 de l'agriculture
Université Laval
Québec, Québec, G1V 0A6
courriel : robert.lagace@fsaa.ulaval.ca<mailto:robert.lagace@fsaa.ulaval.ca>
tél: (418)-656-2131 poste 402276
fax : (418)-656-3723

neteler · November 30, 2021, 6:04pm

Hi,

On Tue, Nov 30, 2021 at 2:38 PM Robert Lagacé
<robert.lagace@fsaa.ulaval.ca> wrote:

I found and solved the problem.

Glad you solved it!

Adding a "print" statement before the offending line, I found the problem.

GRAAS was trying to read the file "menudata.xml" in
"~/.grass7/toolboxes/" which was empty. I deletes the ~/.grass7
directory. When starting a new GRASS session, it creates a new directory
without any file in the toolboxes directory.

GRASS has no instructions for dealing with a empty file.

Good catch. Would you mind to open an issue at
https://github.com/OSGeo/grass/issues

briefly describing problem and solution/workaround? Then we can handle
it in a better way.

Thanks,
Markus

Those files in the "toolboxes" directory are for menu customisation.
They were probably create from a previous GRASS version.

Le 2021-11-24 à 07 h 32, Robert Lagacé a écrit :
> I have a problem starting 7.8.6 on Ubuntu 18.04.6 LTS. It may be a bug
> or a problem related to the Python or wxPython Version.
>
> After defining a location which create the appropriate files and the
> permanent data set, I get the following message when i hit the "Start"
> buttom :
>
> Démarrage du SIG GRASS ...
> Nettoyage des fichiers temporaires ...
>
> __________ ___ __________ _______________
> / ____/ __ \/ | / ___/ ___/ / ____/ _/ ___/
> / / __/ /_/ / /| | \__ \\_ \ / / __ / / \__ \
> / /_/ / _, _/ ___ |___/ /__/ / / /_/ // / ___/ /
> \____/_/ |_/_/ |_/____/____/ \____/___//____/
>
> Bienvenue dans le SIG GRASS 7.8.6
> Page d'accueil du SIG GRASS :

...

> Cette version fonctionne avec : Bash Shell (/bin/bash)
> L'aide est disponible par la commande : g.manual -i
> Voir les termes de la licence avec : g.version -c
> Voir les termes de la licence avec : g.version -x
> Si requis, redémarrer l'interface graphique avec :g.gui wxpython
> Lors prêt pour la fermeture entrer : exit
>
> Lancement de l'interface graphique <wxpython> en tâche de fond, merci
> de patienter ...
> To run a command as administrator (user "root"), use "sudo <command>".
> See "man sudo_root" for details.
>
> GRASS 7.8.6 (L_MTM_7):~ > Traceback (most recent call last):
> File "/usr/lib/grass78/gui/wxpython/wxgui.py", line 106, in OnInit
> workspace=self.workspaceFile)
> File "/usr/lib/grass78/gui/wxpython/lmgr/frame.py", line 129, in
> __init__
> self._menuTreeBuilder =
> LayerManagerMenuData(message_handler=add_menu_error)
> File "/usr/lib/grass78/gui/wxpython/lmgr/menudata.py", line 42, in
> __init__
> message_handler=message_handler)
> File "/usr/lib/grass78/gui/wxpython/core/menutree.py", line 71, in
> __init__
> xmlTree = etree.parse(filename)
> File "/usr/lib/python3.6/xml/etree/ElementTree.py", line 1196, in parse
> tree.parse(source, parser)
> File "/usr/lib/python3.6/xml/etree/ElementTree.py", line 597, in parse
> self._root = parser._parse_whole(source)
> xml.etree.ElementTree.ParseError: no element found: line 1, column 0
> OnInit returned false, exiting...
>
> I did not have this problem with the previous version.
>
> I also try to start on a previous data set and get the same message.
>
> Thanks
>

--
-----------
Robert Lagacé, ing., agr., prof.titulaire
Département de SGA
2425 de l'agriculture
Université Laval
Québec, Québec, G1V 0A6
courriel : robert.lagace@fsaa.ulaval.ca<mailto:robert.lagace@fsaa.ulaval.ca>
tél: (418)-656-2131 poste 402276
fax : (418)-656-3723

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