[Qgis-user] again QGIS won't open

[Tobias Schula]

Am 08.09.25 um 00:01 schrieb Stephen Sacks via QGIS-User:
>    Here's what I did:
> 1.   Windows key + R   gets me to a Run window and then CMD gets me to a 
> command prompt.
>   2.  chdir c:\osgeo4w  gets me to the OSGeo4W folder.
>   3.  Separately, I tried each of the following four commands:
>        c.  qgis
>        b.  qgis --profile my-new-profile
>        c.  qgis-ltr --profile my-new-profile
>        d.  qgis --noplugins
> 
> In each case the response is:  'qgis'  is not recognized as an internal 
> or external command, operable program or batch file.

Don't open a regular command prompt! You need to explicitly open the 
OSGeo4W shell. This shell will set the needed environment variables to 
be able to successfully launch QGIS. You'll find the OSGeo4W shell 
either in the start menu and/or on the desktop in the OSGeo4W folder.
> Shall I re-install QGIS 3.40 ?Since you've mentioned that you've changed some Python scripts, yes. 
Backup your profile from:

 > C:\Users\<your_user_name>\AppData\Roaming\QGIS\QGIS3\profiles ,

uninstall everything, after uninstalling remove the C:\OSGeo4W folder, 
download the most recent installer and reinstall. If you need to run 
QGIS or other OSGeo4W software from the command line, always use the 
OSGeo4W shell!

Best regards
-- 
Tobias A Schula
Forestry Expert

geospatial at schula.org

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