[GRASS-user] Fire Simulation bug

[Adam Dershowitz]

I downloaded the 6.x firesimulation data set and demo script from:
http://www.hpcc.nectec.or.th/grass/download/data6.php  (Yes, I am  
using the script on that page, not the one that is included in the  
compressed file)
But, when I run it I get an error:

It gets as far as this:
  r.random my_spread n=10 raster_output=my_path
Collecting Stats...
  100%
Writing raster map <my_path> ...
  100%

But then reports an error here:
r.spreadpath -v x_input=my_spread.x y_input=my_spread.y \
 > output=my_path
ERROR: option <output>: <my_path> exists.

It is correct that my_path exists, because it was created in the prior  
step.  But the documentation for r.spreadpath says in part:

output=name
Name of raster map layer to contain output. Also can be used as the  
map layer of the input target points. If so used, the input target  
point map will be overwritten by the output.

It seems like the script is trying to use this as both the input and  
output, as it says should be allowed.  But it is instead giving an  
error.  I also tried to add --overwrite to r.spreadpath, but then I  
just get a completely yellow window for the output with no paths at all.

Is there a bug in the script, or a bug in r.spreadpath?

I am using William Kyngesburye's Grass 6.4RC5 on a Mac OS 10.5.

Thanks,

--Adam



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