[Qgis-user] QGIS3 Mac Grass error

[knussear]

Trying to run an edge detection on a gtiff with the i.zc grass module.
Getting the following error. Any thoughts on how to fix?

Processing algorithm…
AlgorithmDialog
Input parameters:
{ 'input' : '/Users/knussear/Research/Classes/Geog 407 Advanced GIS/Fall
2017 KN/Lectures/Processing/ndvi/ndvitst2_index_ndvi.tif', 'width' : 9,
'threshold' : 10, 'orientations' : 2, 'output' :
'/var/folders/5n/ct7t4pbx3b71r1wj5vcc3tgw0000gn/T/processing_91fb1e9f97d640bc9348876bac49ddfb/5f0801db158d48b6a0d896426863451e/output.tif',
'GRASS_REGION_PARAMETER' : '', 'GRASS_REGION_CELLSIZE_PARAMETER' : 0,
'GRASS_RASTER_FORMAT_OPT' : '', 'GRASS_RASTER_FORMAT_META' : '' }

g.proj -c proj4="+proj=utm +zone=11 +datum=WGS84 +units=m +no_defs"
r.external input="/Users/knussear/Research/Classes/Geog 407 Advanced
GIS/Fall 2017 KN/Lectures/Processing/ndvi/ndvitst2_index_ndvi.tif" band=1
output="rast_5aba56ef784465" --overwrite -o
g.region n=4408682.2852300005 s=4408487.032900001 e=301063.33025
w=300841.31027 res=0.10100999999999215
i.zc input=rast_5aba56ef784465 width=9 threshold=10 orientations=2
output=output0724be7b70c945f7b0d70630daca8dce --overwrite
g.region raster=output0724be7b70c945f7b0d70630daca8dce
r.out.gdal -t -m input="output0724be7b70c945f7b0d70630daca8dce"
output="/var/folders/5n/ct7t4pbx3b71r1wj5vcc3tgw0000gn/T/processing_91fb1e9f97d640bc9348876bac49ddfb/5f0801db158d48b6a0d896426863451e/output.tif"
format="GTiff" createopt="TFW=YES,COMPRESS=LZW" --overwrite
/var/folders/5n/ct7t4pbx3b71r1wj5vcc3tgw0000gn/T/processing_91fb1e9f97d640bc9348876bac49ddfb/grassdata/temp_location/PERMANENT:
/Applications/QGIS3.app/Contents/MacOS/grass/etc/colors/grass: Permission
denied 
/var/folders/5n/ct7t4pbx3b71r1wj5vcc3tgw0000gn/T/processing_91fb1e9f97d640bc9348876bac49ddfb/grassdata/temp_location/PERMANENT:
/Applications/QGIS3.app/Contents/MacOS/grass/etc/colors/grass: Permission
denied 
Execution completed in 0.39 seconds
Results:
{'output': <QgsProcessingOutputLayerDefinition
{'sink':/var/folders/5n/ct7t4pbx3b71r1wj5vcc3tgw0000gn/T/processing_91fb1e9f97d640bc9348876bac49ddfb/5f0801db158d48b6a0d896426863451e/output.tif,
'createOptions': {'fileEncoding': 'System'}}>}

Loading resulting layers
The following layers were not correctly generated.
/var/folders/5n/ct7t4pbx3b71r1wj5vcc3tgw0000gn/T/processing_91fb1e9f97d640bc9348876bac49ddfb/5f0801db158d48b6a0d896426863451e/output.tif
You can check the 'Log Messages Panel' in QGIS main window to find more
information about the execution of the algorithm.



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