QGIS » QGIS Application

Similar error here, on QGIS 3.4:

Traceback (most recent call last):
File "C:/OSGEO4~1/apps/qgis-rel-dev/./python/plugins\processing\algs\grass7\Grass7Algorithm.py", line 411, in processAlgorithm
Grass7Utils.executeGrass(self.commands, feedback, self.outputCommands)
File "C:/OSGEO4~1/apps/qgis-rel-dev/./python/plugins\processing\algs\grass7\Grass7Utils.py", line 372, in executeGrass
for line in iter(proc.stdout.readline, ''):
File "C:\OSGEO4~1\apps\Python37\lib\codecs.py", line 322, in decode
(result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc7 in position 4: invalid continuation byte

Giovanni, data and paths don't have any complex characters, and work well on QGIS 2.18.25.

Cleaning C:\Users\PedroVenancio\AppData\Roaming\QGIS\QGIS3\profiles\default does not solved the problem.

Changing windows regional settings to English (United States) solves the problem!

So, the problem is related to some regional setting(s).

I' m a chinese. I meet the same problem on QGIS3.4. However I make sure there is no any special chars in path.(no chinese and I also try to use temporary layer)
I change the windows region to US, including system language. But the UI language still shows chinese. I think i don't install EN language package in system.
I also change QGIS locale to US.
Of couse, the prolem exists.

Some inputs from Nyall about this one:

I had a super-brief look into this one. For anyone's who's investigating a fix, it's something like this:

https://adminswerk.de/python3-unicodedecodeerror-popen/

(But it's not directly that -- if I do the exact same change then I get a lockup).

Hope that helps!
Nyall

http://osgeo-org.1560.x6.nabble.com/QGIS-Developer-Early-3-4-point-release-tp5383869p5384478.html

Well，the problem still exists in QGIS3.4.1. But I found there are no problems in QGIS3.2.3 without locale change.(Default region is China)

Same here with GRASS (Processing works fine though) with 3.4.1 on Windows 7 and de_ch as regional settings:

Starting GRASS GIS...
Traceback (most recent call last):
File "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Algorithm.py", line 415, in processAlgorithm
Grass7Utils.executeGrass(self.commands, feedback, self.outputCommands)
File "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", line 372, in executeGrass
for line in iter(proc.stdout.readline, ''):
File "C:\OSGEO4~1\apps\Python37\lib\codecs.py", line 322, in decode
(result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xf6 in position 81: invalid start byte

After switching OS regional setting to en_us and also QGIS locale to en_us, everything works fine. Probably related to #20344?

For me, this issue is solved with 3.4.2. Can anybody confirm this?

Of coure, the issue is solved too in Chinese system with QGIS3.4.2.

Fix confirmed also here!

Thanks!

Can someone with regional settings different from English test this issue again?

I'm getting a similar error, even after this 0c36b90eafc80e4b6bfe7091b9c07ecf80afc744

Traceback (most recent call last):
File "C:/OSGEO4~1/apps/qgis-rel-dev/./python/plugins\processing\algs\grass7\Grass7Algorithm.py", line 413, in processAlgorithm
Grass7Utils.executeGrass(self.commands, feedback, self.outputCommands)
File "C:/OSGEO4~1/apps/qgis-rel-dev/./python/plugins\processing\algs\grass7\Grass7Utils.py", line 375, in executeGrass
for line in iter(proc.stdout.readline, ''):
File "C:\OSGEO4~1\apps\Python37\lib\codecs.py", line 322, in decode
(result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'CP_UTF8' codec can't decode byte 0xc7 in position 4: No mapping for the Unicode character exists in the target code page.

The difference is:

UnicodeDecodeError: 'CP_UTF8' codec can't decode byte 0xc7 in position 4: No mapping for the Unicode character exists in the target code page.

Ok, the problem is this one, commented in this b39e5a0937e5e317b42088e8a8ccae327ae8e033

Hi, is this the same problem?

I run 3.4.2 on a french canadian windows 10 machine, qgis is made portable with a batch script.

Processing algorithm…
Algorithm 'v.clean' starting…
Input parameters:
{ '-b' : False, '-c' : False, 'GRASS_MIN_AREA_PARAMETER' : 0.0001, 'GRASS_OUTPUT_TYPE_PARAMETER' : 0, 'GRASS_REGION_PARAMETER' : None, 'GRASS_SNAP_TOLERANCE_PARAMETER' : -1, 'GRASS_VECTOR_DSCO' : '', 'GRASS_VECTOR_LCO' : '', 'error' : 'C:/Users/my_username/AppData/Local/Temp/processing_287288bf2b804ee6b24c5552db1bb035/f7dda6a0a1ce48a59c7093e54c901e38/error.gpkg', 'input' : 'C:\\Users\\my_username\\Desktop\\temp\\rmareatest.shp|layername=rmareatest', 'output' : 'C:/Users/my_username/AppData/Local/Temp/processing_287288bf2b804ee6b24c5552db1bb035/5e410c8fe7594c23bf3f92bb2285e722/output.gpkg', 'threshold' : '', 'tool' : [10], 'type' : [4] }

v.in.ogr min_area=0.0001 snap=-1.0 input="C:\Users\my_username\Desktop\temp\rmareatest.shp" layer="rmareatest" output="vector_5c46404173fb23" --overwrite -o
g.region n=5062643.2 s=5048824.38 e=306671.14 w=294370.81
v.clean input=vector_5c46404173fb23 type="area" tool="rmarea" output=outputb4bb433870364941aae38cbb027e68be error=errorb4bb433870364941aae38cbb027e68be --overwrite
v.out.ogr -c type="auto" input="outputb4bb433870364941aae38cbb027e68be" output="C:\Users\my_username\AppData\Local\Temp\processing_287288bf2b804ee6b24c5552db1bb035\5e410c8fe7594c23bf3f92bb2285e722\output.gpkg" format="GPKG" --overwrite
v.out.ogr -c type="auto" input="errorb4bb433870364941aae38cbb027e68be" output="C:\Users\my_username\AppData\Local\Temp\processing_287288bf2b804ee6b24c5552db1bb035\f7dda6a0a1ce48a59c7093e54c901e38\error.gpkg" format="GPKG" --overwrite
Le chemin d'accŠs sp‚cifi‚ est introuvable.
Le chemin d'accŠs sp‚cifi‚ est introuvable.
File "C:\_Cportable\QGIS_3.4.2_x64\qgis\apps\Python37\lib\site.py", line 177
file=sys.stderr)
^
SyntaxError: invalid syntax
Appuyez sur une touche pour continuer...
Traceback (most recent call last):
File "C:\_Cportable\QGIS_3.4.2_x64\qgis/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Algorithm.py", line 413, in processAlgorithm
Grass7Utils.executeGrass(self.commands, feedback, self.outputCommands)
File "C:\_Cportable\QGIS_3.4.2_x64\qgis/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", line 411, in executeGrass
startupinfo=si if isWindows() else None
File "C:\_Cportable\QGIS_3.4.2_x64\qgis\apps\Python37\lib\subprocess.py", line 756, in __init__
restore_signals, start_new_session)
File "C:\_Cportable\QGIS_3.4.2_x64\qgis\apps\Python37\lib\subprocess.py", line 1155, in _execute_child
startupinfo)
OSError: [WinError 87] Paramètre incorrect

Execution failed after 0.63 seconds

Loading resulting layers
The following layers were not correctly generated.<ul><li>C:/Users/my_username/AppData/Local/Temp/processing_287288bf2b804ee6b24c5552db1bb035/5e410c8fe7594c23bf3f92bb2285e722/output.gpkg</li><li>C:/Users/my_username/AppData/Local/Temp/processing_287288bf2b804ee6b24c5552db1bb035/f7dda6a0a1ce48a59c7093e54c901e38/error.gpkg</li></ul>You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm.