[GRASS-user] problems with using GRASS 7 on windows 7

[Eleftheria Paliou]

Hi, 
I installed GRASS 7 
(WinGRASS-7.0.svn-r57740-711 )on Windows 7 afew days ago and I am experiencing some problems with using the software. I hope someone in the list can help me solve some of the problems.
One problem is that I cannot run succesfully python scripts that make use of a scripted graphical interface 
( scripts with no arguments seem to work 
fine) and this applies to all scripts, also those found in GRASS 7 website and the grass 
7 scripts folder (although I have to add I only tried to run a couple of "simple" scripts 
with few required arguments):

To give you an example:
When I try to run r.rgb.py through file-> launch script I get following error message:

Launching script 'C:\GRASS7\GRASS7.svn\scripts\r.rgb.py'...
Exception in thread Thread-24:
Traceback (most recent call last):
  File "C:\GRASS7\GRASS7.svn\Python27\lib\threading.py",
line 810, in __bootstrap_inner
    self.run()
  File
"C:\GRASS7\GRASS7.svn\etc\gui\wxpython\core\gconsole.py",
line 153, in run
    self.resultQ.put((requestId, self.requestCmd.run()))
  File "C:\GRASS7\GRASS7.svn\etc\gui\wxpython\core\gcmd.py",
line 552, in run
    env = self.env)
  File "C:\GRASS7\GRASS7.svn\etc\gui\wxpython\core\gcmd.py",
line 172, in __init__
    subprocess.Popen.__init__(self, args, **kwargs)
  File "C:\GRASS7\GRASS7.svn\Python27\lib\subprocess.py",
line 711, in __init__
    errread, errwrite)
  File "C:\GRASS7\GRASS7.svn\Python27\lib\subprocess.py",
line 948, in _execute_child
    startupinfo)
TypeError: environment can only contain strings

When I try the same script through the command line I get this message:
syntax error, unexpected '@', expecting '('
Parse error
ERROR: parse error
ERROR: An error occurred while running r.mapcalc

Nonetheless, when I give an output_prefix (which is optional) the script runs.  Other scripts, for 
example, r.out.xyz.py gives "a cannot find output error" or simply does not produce output 
(even when I give a name for the output which in any case is optional and should not make 
any difference unless I am missing something).

The other problem I have is also with the v.db.addcolumn  and v.db.dropcolumn column commands which work when I run them from the command line, but not when I use a command through python shell
e.g. grass.run_command ("v.db.addcolumn", map="sites", columns="new_column"). These commands also don't work through the Grass GUI, e.g. through Manage tables. For example when I choose drop selected column, I get a warning message that the coulumn will be deleted, but in the end it is not removed from the table.

Does anyone have any idea what might cause these errors and how I could fix the problem?

Any help will be greatly appreciated!
best wishes,
Eleftheria
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