[GIS] Why is QGIS not launching

installationqgiswindows

I've got a problem using QGIS. Always when I try to launch the programme with the desktop icon, nothing happens. I also checked the Task Manager and it doesn't show any process running regarding qGIS.

The target field shows this: "C:\Program Files\Quantum GIS Lisboa\bin\nircmd.exe" exec hide "C:\Program Files\Quantum GIS Lisboa\bin\qgis.bat"

I had Microsoft C++ 2008 already installed, so I launched the installer and selected to repair it. However, QGIS still isn't launching.

I'm using Vista 32-bit.

I've tried to launch it manually, but then I get an error message telling me, that qgis.bat couldn't be found. I don't have any .qgs files on my PC, so I can't test it.

I can't find qgis.bat in the bin folder. But there's a file there called 'qgis.bat.tmpl'.

Best Answer

I had the same problem...I resolved it by doing the following: - Upon locating qgis.bat, right click and go to edit mode. - add PATH %systemroot%\system32; %systemroot%; %systemroot%\system32\wbem after @echo off - Save - Retry launching qGIS.

I don't know why, but think i had this problem due to some system .dll files that were already on my machine and may have conflicted with those belonging to qgis.

PYTHONPATH

The PYTHONPATH is set for the cmd you launch. This means that you have to set it globally on your system

Go to Control Panel -> System-> Advanced.

Click on the 'Environment Variables' button.

In the 'System Variables' panel that appears, click New and enter PYTHONPATH in the 'Variable Name' field. In the 'Variable Value' field enter the path to QGIS.

Or you can set it directly on the cmd command line just before launching the python interpreter with :

set PYTHONPATH=%PYTHONPATH%;C:\My_python_lib

PATH

The DLL which will be used by the qgis python module must be in your path. Just as you set the PYTHONPATH above, set the PATH environment variable so that it contains the directory where qgis_core.dll is located.

The directory to add is probably D:\Program Files (x86)\Quantum GIS Wroclaw\apps\qgis But check that qgis_core.dll is really there.

OSGEO4W

As was suggested in another answer, OSGEO4W install and sets everything up for you. It will install another Python though, which can complicate things when you want to install third party Python modules not available in OSGEO4W.

You would as well get the latest QGIS version too, which is 1.7.4 (1.8 coming soon).

[GIS] QGIS 1.8 Did Not Install Properly– Will not recognize modules or DLLs– conflicting with existing PyQt

I guess you have installed the standalone installer. Try the OsGeo4W installer, which installs to C:\OSGeo4W. That will give you no conflicts with spaces in folder names.

Also, rename the folder of your existing Python and PyQt temporarily to make sure you start the right python. Starting of Osgeo4W programs has to be by using the bat files, not the exe's. In the bat files, necessary environment variables are set.

And, by the way, Qgis is running here on Windows 7 with no need for screwing up. Even python 7 installed in parallel, but not PyQt. Most likely PyQt and Qgis interfere at your computer.

Best Answer

Related Solutions

Python – How to Import qgis.core to Python App

PYTHONPATH

PATH

OSGEO4W

[GIS] QGIS 1.8 Did Not Install Properly– Will not recognize modules or DLLs– conflicting with existing PyQt

Related Question