[Qgis-user] QGIS instalation and uninstallation issues

Fri Jul 17 01:08:25 PDT 2015

The reason I use the OSGEO4W installer is for that very reason, if you 
wish to update, you use the installer again, and you don't need to do 
steps 1 to 5.
a lot of the issues stem from the fact that people are using QGIS in 
conjunction with other software (GRASS and SAGA etc) keeping the links 
correct when using standalone installers will always be hardest. I liken 
it to trying to get ArcGIS model builder tools working with MapInfo or 
vice versa.
The OSGEO installer installs everything in a single directory with a 
similar structure. Makes the whole process a lot easier.

On 16/07/2015 14:08, Mats Elfström wrote:
> Why does it have to be this hard to install amd maintain QGis on the 
> most common os of the world?
> Not to mention QGis server which apparently no one manages to install.
>
> Hälsning / Regards
> Mats.E
>
> Skickat från min / Sent from my iPhone, Ursäkta att jag är kortfattad 
> / Excuse my brevity.
>
> 16 jul 2015 kl. 13:02 skrev Richard McDonnell 
> <richard.mcdonnell at opw.ie <mailto:richard.mcdonnell at opw.ie>>:
>
>> Please see below,
>> In my experience, if you want QGIS to work within Windows with some 
>> stability with GRASS and SAGA you need to use the OSGEO4W installer 
>> not the standalone.
>>
>>  1. Backup python Plugins(C:\OSGeo4W64\apps\qgis\python\plugins for
>>     Python Plugins)
>>  2. Delete the OSGEO4W folder
>>  3. If you have other versions of the software installed via
>>     standalone installers, uninstall all the Programs (QGIS,GRASS,
>>     SAGA etc)
>>  4. Run a search for QGIS and delete any other folders (besides your
>>     Backup...be careful)
>>  5. If you don't have ccleaner or similar install it, click on
>>     Registry (Left icon second from top), Scan for issues & then Fix
>>     selected issues, repeat untill there are no issues.
>>  6. Download most recent version of OSGEO4W installer (not standalone
>>     QGIS installer see http://trac.osgeo.org/osgeo4w/ )
>>  7. Do a standard Desktop instillation, It will install QGIS GRASS
>>     SAGA and uDig, R should also be installed (Im open to correction)
>>  8. When you have finished over wright the plugins folder with the
>>     backup.
>>  9. Now you may have some issues initially, but redirecting is easy
>>     enough, just direct everything to the corresponding OSGEO4W folder.
>>
>> This is what I remember having to do with my last instillation, I 
>> cant currently verify the above, as I don't have sufficient rights on 
>> my Work PC at present.
>> Contact me if you run into any issues!
>>
>> Regards,
>>
>> Richard.
>>
>> On 15/07/2015 11:43, Evanilton Pires wrote:
>>> Dear QGIS users
>>>
>>> My name is Evanilton Edgar Serrão Pires, I am an Environmental 
>>> Engineering student and a QGIS user.
>>>
>>> I started to use QGIS 2.2.0 Valmiera last year and since my first 
>>> installation it never installed GRASS and SAGA correctly (their 
>>> shortcut never appeared correctly and never worked, therefore I 
>>> could never use those applications inside QGIS)  . At that time I 
>>> was using Windows 8. When I started QGIS it appeared a dialogue box 
>>> saying «QGIS couldn't find your GRASS installation.
>>>
>>> Would you like to specify path (GISBASE) to your GRASS 
>>> installation?». And inside QGIS, SAGA and GRASS algorithms never 
>>> worked properly. With the new releases of QGIS 2.4.0 Chugiak and 
>>> 2.6.0 Brighton, when uninstalling, it would uninstall and install 
>>> normally, however, always telling me that the previous version was 
>>> already installed at the time of the installation, although I 
>>> uninstalled it previously.
>>>
>>> Early this year, I bought a new computer (which came with Windows 
>>> 8.1 Single Language) and I installed QGIS 2.8.1 Wien in first place 
>>> (the first app to be installed right when I bought the computer, 
>>> after the anti-virus, of course) and for my joy, it installed GRASS 
>>> and SAGA correctly and was working very well, in such way that I was 
>>> very happy with it. However, on the 25th of May, I uninstalled the 
>>> 2.8.1 version and installed the 2.8.2, but for my displeasure, the 
>>> GRASS and SAGA plugins were not properly installed again.
>>> I went to the QGIS project website looking for solutions and I found 
>>> a page saying that I should specify the path for the ''.exe'', but 
>>> in the program folder  there is no executor file. I even installed 
>>> GRASS independently again and in the new installation folder there 
>>> is no ''.exe'' either. When I install SAGA independently it does not 
>>> work with QGIS.
>>> Another strange thing is that after I have uninstalled the 2.8.1 
>>> version and tried to install the 2.8.2, for the first time when 
>>> installing it appeared the information of skipping all the folder 
>>> creations and extractions, and at the end it said that QGIS was 
>>> installed but the application did not exist in my computer. When I 
>>> installed for the second time, it extracted and created the folders, 
>>> and when finished QGIS was in my computer. Attached you may find the 
>>> file it produced in the first attempt.
>>>
>>> I always install using the standalone-installer.
>>>
>>> If you need any further information, please let me know.
>>>
>>> What should I do? Is it normal for the software never be completely 
>>> removed from the system? Please, I really would like to solve this 
>>> issue.
>>>
>>> Hope to hear from you soon.
>>>
>>> QGIS is really good and useful, and I think we should promote its 
>>> development.
>>>
>>> All the best to you guys
>>>
>>>
>>> _______________________________________________
>>> Qgis-user mailing list
>>> Qgis-user at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>
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