[GRASS-dev] temporal framework currently not working on windows

[Anna Petrášová]

I just realized temporal framework doesn't work with recent GRASS 70
version on Windows:
t.list or t.create give me:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\GRASS70\GRASS GIS
7.0.0svn\Python27\lib\multiprocessing\forking.py", line 380,
in main
    prepare(preparation_data)
  File "C:\GRASS70\GRASS GIS
7.0.0svn\Python27\lib\multiprocessing\forking.py", line 495,
in prepare
    '__parents_main__', file, path_name, etc
  File "C:\GRASS70\GRASS GIS 7.0.0svn\scripts\t.create.py",
line 60, in <module>
    import grass.temporal as tgis
  File "C:\GRASS70\GRASS GIS
7.0.0svn\etc\python\grass\temporal\__init__.py", line 29, in
<module>
    from temporal_vector_algebra import *
  File "C:\GRASS70\GRASS GIS 7.0.0svn\etc\python\grass\tempo
ral\temporal_vector_algebra.py", line 422, in <module>
    import grass.pygrass.modules as pygrass
  File "C:\GRASS70\GRASS GIS
7.0.0svn\etc\python\grass\pygrass\modules\__init__.py", line
2, in <module>
    from grass.pygrass.modules.interface import Module,
ParallelModuleQueue
  File "C:\GRASS70\GRASS GIS 7.0.0svn\etc\python\grass\pygra
ss\modules\interface\__init__.py", line 9, in <module>
    from grass.pygrass.modules.interface import module
  File "C:\GRASS70\GRASS GIS 7.0.0svn\etc\python\grass\pygra
ss\modules\interface\module.py", line 188, in <module>
    class Module(object):
  File "C:\GRASS70\GRASS GIS 7.0.0svn\etc\python\grass\pygra
ss\modules\interface\module.py", line 591, in Module
    @mdebug(1, extra=_get_bash)
  File "C:\GRASS70\GRASS GIS 7.0.0svn\etc\python\grass\pygra
ss\modules\interface\module.py", line 36, in mdebug
    msgr = get_msgr()
  File "C:\GRASS70\GRASS GIS
7.0.0svn\etc\python\grass\pygrass\messages\__init__.py",
line 352, in get_msgr
    _instance[0] = Messenger(*args, **kwargs)
  File "C:\GRASS70\GRASS GIS
7.0.0svn\etc\python\grass\pygrass\messages\__init__.py",
line 175, in __init__
    self.start_server()
  File "C:\GRASS70\GRASS GIS
7.0.0svn\etc\python\grass\pygrass\messages\__init__.py",
line 185, in start_server
    self.server.start()
  File "C:\GRASS70\GRASS GIS
7.0.0svn\Python27\lib\multiprocessing\process.py", line 130,
in start
    self._popen = Popen(self)
  File "C:\GRASS70\GRASS GIS
7.0.0svn\Python27\lib\multiprocessing\forking.py", line 258,
in __init__
    cmd = get_command_line() + [rhandle]
  File "C:\GRASS70\GRASS GIS
7.0.0svn\Python27\lib\multiprocessing\forking.py", line 358,
in get_command_line
    is not going to be frozen to produce a Windows
executable.''')
RuntimeError:
            Attempt to start a new process before the
current process
            has finished its bootstrapping phase.
            This probably means that you are on Windows and
you have
            forgotten to use the proper idiom in the main
module:
                if __name__ == '__main__':
                    freeze_support()
                    ...
            The "freeze_support()" line can be omitted if
the program
            is not going to be frozen to produce a Windows
executable.

I tested with the most recent build and a user reports the same problem
with r62706.

Anna
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