[GRASS-user] Map display does not open at start

[Daniel Victoria]

I just installed Grass 6.4.3.RC2 from OSGeo4W (win7 here) and when I start
Grass the Layer Manager opens but the GIS Map Display does not show up.

In the command console I see the folowing message:

-------------------------------
Traceback (most recent call last):
  File "C:\OSGeo4W\apps\grass\grass-6.4.3RC2\etc\wxpython\ma
pdisp\mapwindow.py", line 425, in OnIdle

self.UpdateMap(render = True)
  File "C:\OSGeo4W\apps\grass\grass-6.4.3RC2\etc\wxpython\ma
pdisp\mapwindow.py", line 575, in UpdateMap

windres = windres)
  File "C:\OSGeo4W\apps\grass\grass-6.4.3RC2\etc\wxpython\co
re\render.py", line 875, in Render

os.environ["GRASS_REGION"] = self.SetRegion(windres)
  File "C:\OSGeo4W\apps\grass\grass-6.4.3RC2\etc\wxpython\co
re\render.py", line 702, in SetRegion

region = self.AdjustRegion()
  File "C:\OSGeo4W\apps\grass\grass-6.4.3RC2\etc\wxpython\co
re\render.py", line 488, in AdjustRegion

self.region["nsres"] =  mapheight / self.height
ZeroDivisionError
:
float division by zero
---------------------------------------------
If I open a new display it works and I can load image used to create the
location.

I've deleted and re-created the location several times but nothing changed.

I've seen some bug reports about this error but did not manage to find a
solution

Here is the output of g.region -p
-----------------------------------------------
projection: 1 (UTM)
zone:       -23
datum:      wgs84
ellipsoid:  wgs84
north:      7548415.00000001
south:      7338385
west:       384884.99999999
east:       623415
nsres:      30
ewres:      30
rows:       7001
cols:       7951
cells:      55664951
----------------------------------------------------

Cheers
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