[QGIS-Developer] Issue with QGIS 3.16.2 standalone and GRASS 7.8.4

[Martin Pergler]

Myriam63 wrote
> Hi all
> 
> I installed the version of QGIS with
> QGIS-OSGeo4W-3.16.2-2-Setup-x86_64.exe,
> but the versions that were installed are 3.16.2-1 (not 3.16.2-2) for QGIS
> and 7.8.5-1 for GRASS, checked with OSGeo4W Setup.
> When i use QGIS with "QGIS Desktop 3.16.2 with GRASS 7.8.4" link, i get
> the
> following error message:
> 2020-12-24T14:15:50     WARNING    GRASS init error : Problem in GRASS
> initialization, GRASS provider and plugin will not work : Module built
> against version d8fbd49af but trying to use version 2b6ab2893. You need to
> rebuild GRASS GIS or untangle multiple installations.
> and I cannot use GRASS7 extension.
> 
> Someone can help me ?
> Thank you so much.
> 
> 
> 
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>From Andrea's reponse to my email upstream on this, my hypothesis is that
the Windows QGIS standalone installer on the QGIS website installs 3.16.2-2,
and works with GRASS. 

However, the OSGeo4W component installer (whatever it is properly called,
where you choose which OSGeo packages are to be installed and can update
previous installations), *still* installs 3.16.2-1, and therefore GRASS does
not work under QGIS.

However, I have not had time to test this since Andrea's email, and so I may
be wrong. But your (Myriam's) experience in addition to mine would support
it.



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