[GRASS-user] Regarding issues with v.class.mlpy and v.class.ml

[iat bd]

Date: December 01, 2014

Hi all,

I am a new Grass user and am trying to use it (through the windows GUI) for
OBIA analyses - following the method described by Mr. Lennart in his shell
script:

http://lists.osgeo.org/pipermail/grass-dev/2013-October/066181.html

*Problem history:* I am stranded at the last step (which requires usage of
v.class.mlpy add-on extension). I asked the question before and got some
lead from Mr. Nikos and Mr. Pietro (thanks again!) - install Scikit-learn
library and so on. I installed all the associated libraries. However, I
could not solve the problem due to my limited knowledge of Python.

*Current Problem:* Sorry to ask for help again but I think the problem has
morphed. Upon re installation of Grass 7.0 and 7.1 and the add-ons, the
earlier error messages no longer appear (I am assuming some modifications
were made). The latest error messages upon attempt to run the add-on
references some files in the grass installation. I am attaching the error
message for your reference.

I'll appreciate it if anyone can explain the troubleshooting process in a
step by step method (preferably with some screenshots, assuming the
instructed person has no previous knowledge of Python or grass file
architecture. My trainees and I are predominantly civil engineering
graduates - with basic coding knowledge but zero exposure in python).

With kind regards,

Imtiaz
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Traceback (most recent call last):
  
File "C:\Program Files (x86)\GRASS GIS 7.0.0svn\gui\wxpython\gui_core\menu.py", 

line 162, in
<lambda>

self._btnRun.Bind(wx.EVT_BUTTON, lambda evt: self.Run())
  
  
File "C:\Program Files (x86)\GRASS GIS 7.0.0svn\gui\wxpython\gui_core\menu.py", 

line 223, in Run

eval(handler)(event=None, cmd=data['command'].split())
  
  
File "C:\Program Files (x86)\GRASS GIS 7.0.0svn\gui\wxpython\lmgr\frame.py", 

line 774, in OnMenuCmd

GUI(parent=self, giface=self._giface).ParseCommand(cmd)
  
  
File "C:\Program Files (x86)\GRASS GIS 7.0.0svn\gui\wxpython\gui_core\forms.py", 

line 2331, in
ParseCommand

raise gcmd.GException(e.value)
core.gcmd
.
GException
:
Unable to fetch interface description for command
'v.class.ml'.
Details:
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Traceback (most recent call last):

File "C:\Program Files (x86)\GRASS GIS 7.1.svn\gui\wxpython\gui_core\prompt.py", 

line 263, 

in
OnItemSelected

self.cmdDesc = gtask.parse_interface(cmd)
  
  
File "C:\Program Files (x86)\GRASS GIS 7.1.svn\etc\python\grass\script\task.py", 

line 509, 

in
parse_interface

tree = etree.fromstring(get_interface_description(name))
  
  
File "C:\Program Files (x86)\GRASS GIS 7.1.svn\etc\python\grass\script\task.py", 

line 493, 

in
get_interface_description

"\n\nDetails: %(det)s") % {'cmd': cmd, 'det': e}
grass.exceptions
.
ScriptError
:
Unable to fetch interface description for command
'v.class.ml'.
Details: