[GRASS-dev] Region problems in grass 6.3 (maybe also 6.1)...

[Isaac Ullah]

Hi all,

      A very interesting and frustrating problem has just presented 
itself to me. The region settings seem to "break" after using the new 
zoom tools from the map display. i get the following error message in 
the Output window:

region for current mapset is invalid
line 15: <depths:     0>
run "g.region"

    This message displays after zooming a few times, or after attempting 
to do anything at all with "g.region" (including just printing region 
settings). Also, all the new zoom tools in the map display seem to do 
nothing after this message, and I cannot display any of the maps in my 
mapset. I have looked at the WIND file for the afflicted mapsets, and 
they seem perfectly normal. For example, the above error message is 
associated with the following WIND file:


proj:       1
zone:       36
north:      3742844.70455
south:      3309044.70455
east:       944264.754065
west:       560076.932184
cols:       12806
rows:       14460
e-w resol:  30.0006108
n-s resol:  30
top:        1
bottom:     0
cols3:      12806
rows3:      14460
depths:     1
e-w resol3: 30.0006108
n-s resol3: 30
t-b resol:  1

 Making a new mapset allows me to run "g.region" without any problems 
until I use the new zooming tools, and then the same problem occurs. 
Restarting GRASS initially allows for the maps to be displayed again, 
but after zooming a bit, or trying to run "g.region" again, the region 
eventually "breaks" again. What I specifically do not understand is why 
the error tells me to run "g.region" when doing so does nothing, and 
seems to even cause the error in the first place. Does anybody have any 
idea what the issue is here? I am using GRASS 6.3, compiled from the CVS 
source yesterday (08/15)... Any help would be greatly appreciated.

Cheers,

Isaac