#3857: r.mapcalc unable to rename null and cell files
-------------------------+-------------------------
Reporter: Hygsson | Owner: grass-dev@…
Type: defect | Status: new
Priority: major | Milestone: 7.6.2
Component: Raster | Version: unspecified
Keywords: r.mapcalc | CPU: x86-64
Platform: MSWindows 7 |
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**Note:** This works on Ubuntu without any problems.
While using GRASS GIS 7.6.1 on 64-bit Windows 7, I encountered a problem
with r.mapcalc. For a simple stochastic simulation of watershed, I used a
following script (here it is recreated for Spearfish dataset).
{{{
g.region raster=elevation.dem@PERMANENT
r.surf.random --overwrite output=frequency min=0 max=0
for (( n=1 ; n<21 ; n=$n+1 ))
do
r.surf.random --overwrite output=errors min=-15 max=15
r.mapcalc "terrain = elevation.dem@PERMANENT + errors@PERMANENT"
--overwrite
r.watershed --overwrite elevation=terrain@PERMANENT
accumulation=accum$n
r.reclass --overwrite input=accum$n@PERMANENT output=flow$n
rules=C:/Users/Hygsson/Desktop/test/reclass.rules
r.mapcalc "frequency = flow$n + frequency" --overwrite
done
}}}
reclass.rules file has a following content:
{{{
-500 thru 654 = 0
* = 1
}}}
I tried to do it step by step without using the script. **The problem
arises with this step:**
{{{
r.mapcalc "frequency = flow$n + frequency" --overwrite
}}}
I get this output for each iteration of the loop. Only numbers behind
'unknown/' are different.
{{{
WARNING: Unable to rename null file
'C:\Users\Hygsson\Documents\grassdata\Spearfish60_grass7\PERMANENT\.tmp/unknown\22368.1'
to
'C:\Users\Hygsson\Documents\grassdata\Spearfish60_grass7\PERMANENT\cell_misc\frequency\nullcmpr':
File exists
WARNING: Unable to rename cell file
'C:\Users\Hygsson\Documents\grassdata\Spearfish60_grass7\PERMANENT\.tmp/unknown\22368.0'
to
'C:\Users\Hygsson\Documents\grassdata\Spearfish60_grass7\PERMANENT\fcell\frequency':
File exists
}}}
The desired 'frequency' raster is created, but obviously in a wrong
manner, having only one value.
--
Ticket URL: <https://trac.osgeo.org/grass/ticket/3857>
GRASS GIS <https://grass.osgeo.org>
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