Hi all, The great news is that I have already solved the problem. I'm just writing to ask if anybody understands the reason behind this phenomenon and to give advice for those how must struggle with the same problem.
I have an eclipse startup bat as instructed in qgis documentation and still, I got the DLL load failed error when trying to import something from qgis.core. The reason for this is the way I defined a jvm for Eclipse in eclipse.ini (I don't have JRE bundled in eclipse installation). At the first, I had in my eclipse.ini -vm C:\ProgramData\Oracle\Java\javapath and I got the ImportError when I changed that to the real JRE path -vm C:\Program Files\Java\jre1.8.0_152\bin\javaw.exe everything work as supposed to. The javapath folder is a "new" way to define used java version. It has symlinks (yes, on windows) to the real java installation. This is the folder that java installation appends to the PATH environment variable. In both ways, the sys.path is the same. When eclipse is started with -vm C:\ProgramData\Oracle\Java\javapath os.environ['PATH'] is: C:/Program Files/Java/jre1.8.0_152/bin/server;C:/Program Files/Java/jre1.8.0_152/bin;C:/Program Files/Java/jre1.8.0_152/lib/amd64;C:\OSGEO4~1\apps\qgis-dev\bin;C:\OSGEO4~1\apps\qt5\bin;C:\OSGEO4~1\apps\Python36;C:\OSGEO4~1\apps\Python36\Scripts;C:\OSGEO4~1\apps\Python27\Scripts;C:\OSGEO4~1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem;C:\OSGeo4W64; and when with -vm C:\Program Files\Java\jre1.8.0_152\bin\javaw.exe the os.environ['PATH'] is: C:\OSGEO4~1\apps\qgis-dev\bin;C:\OSGEO4~1\apps\qt5\bin;C:\OSGEO4~1\apps\Python36;C:\OSGEO4~1\apps\Python36\Scripts;C:\OSGEO4~1\apps\Python27\Scripts;C:\OSGEO4~1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem I don't understand this because of the qgis_core.dll folder C:\OSGEO4~1\apps\qgis-dev\bin is in the PATH with both ways but it on the other way it gives an error. I'm just happy now that I found the solution for this even I don't understand the reason. Should we add this to the documentation also? P.S. Is there a reason for C:\OSGEO4~1\apps\Python27\Scripts to be still on the PATH when using py3 environment? Thanks, -Lauri
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