<div dir="ltr">Hi,<div><br></div><div>Are the dlls inside C:\OSGeo4W\apps\qgis\bin?  Main issue with this error is generally means "we tried to load qgis_app.dll, or another dll that it needs and we couldn't find it so here is a poor error dialog"  It's a tricky one to debug at times. Check that folder first for the dlls and we can go from there if they are.</div><div><br></div><div>There are some other tools you can use to track down what file it might be missing.  </div><div><br></div><div>Also, do you have a virus scanner that might be taking one of the files that QGIS needs to load and moving it away.  We have seen that happen before with some dlls getting moved or blocked from installing due to a virus scanner.</div><div><br></div><div>Regards,</div><div>Nathan</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Nov 27, 2019 at 1:34 AM magerlin <<a href="mailto:MAP@ramboll.dk" target="_blank">MAP@ramboll.dk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Having problems installing QGIS on a colleagues brand new Win 10 PC.<br>
I have recently installed without problems on my own identical PC.<br>
<br>
We have tried 3.4 and 3.10 both as Standalone and from OSGeo4W.<br>
<br>
But situation is the same: <br>
<br>
QGIS 3.4:<br>
<<a href="http://osgeo-org.1560.x6.nabble.com/file/t202356/3%2C4.png" rel="noreferrer" target="_blank">http://osgeo-org.1560.x6.nabble.com/file/t202356/3%2C4.png</a>> <br>
C:\Program Files\QGIS 3.4\apps\qgis-ltr\bin\Qgis_app.dll          <br>
does exist on PC but the .env file does not<br>
<br>
<br>
<br>
QGIS 3.10:<br>
<<a href="http://osgeo-org.1560.x6.nabble.com/file/t202356/3.png" rel="noreferrer" target="_blank">http://osgeo-org.1560.x6.nabble.com/file/t202356/3.png</a>> <br>
<br>
Here the .env file exists and contains this:<br>
<br>
PATH=C:\OSGEO4~1\apps\qgis\bin;C:\OSGEO4~1\apps\grass\grass78\lib;C:\OSGEO4~1\apps\grass\grass78\bin;C:\OSGEO4~1\apps\Python37;C:\OSGEO4~1\apps\Python37\Scripts;C:\OSGEO4~1\apps\qt5\bin;C:\OSGEO4~1\apps\Python37;C:\OSGEO4~1\apps\Python37\Scripts;C:\OSGEO4~1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem<br>
GDAL_DATA=C:\OSGEO4~1\share\gdal<br>
GDAL_DRIVER_PATH=C:\OSGEO4~1\bin\gdalplugins<br>
GDAL_FILENAME_IS_UTF8=YES<br>
GEOTIFF_CSV=C:\OSGEO4~1\share\epsg_csv<br>
GISBASE=C:\OSGEO4~1\apps\grass\grass78<br>
GRASS_PROJSHARE=C:\OSGEO4~1\share\proj<br>
GRASS_PYTHON=C:\OSGEO4~1\bin\python3.exe<br>
JPEGMEM=1000000<br>
OSGEO4W_ROOT=C:\OSGEO4~1<br>
PROJ_LIB=C:\OSGEO4~1\share\proj<br>
PYTHONHOME=C:\OSGEO4~1\apps\Python37<br>
QGIS_PREFIX_PATH=C:/OSGEO4~1/apps/qgis<br>
QT_PLUGIN_PATH=C:\OSGEO4~1\apps\qgis\qtplugins;C:\OSGEO4~1\apps\qt5\plugins<br>
VSI_CACHE=TRUE<br>
VSI_CACHE_SIZE=1000000<br>
O4W_QT_PREFIX=C:/OSGEO4~1/apps/Qt5<br>
O4W_QT_BINARIES=C:/OSGEO4~1/apps/Qt5/bin<br>
O4W_QT_PLUGINS=C:/OSGEO4~1/apps/Qt5/plugins<br>
O4W_QT_LIBRARIES=C:/OSGEO4~1/apps/Qt5/lib<br>
O4W_QT_TRANSLATIONS=C:/OSGEO4~1/apps/Qt5/translations<br>
O4W_QT_HEADERS=C:/OSGEO4~1/apps/Qt5/include<br>
<br>
<br>
<br>
<br>
<br>
<br>
-----<br>
Regards Morten<br>
<br>
Currently using Qgis 3.10.0<br>
Windows 10, 64bit<br>
--<br>
Sent from: <a href="http://osgeo-org.1560.x6.nabble.com/QGIS-Developer-f4099106.html" rel="noreferrer" target="_blank">http://osgeo-org.1560.x6.nabble.com/QGIS-Developer-f4099106.html</a><br>
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