Contents
Why do I get an error loading QGIS?
This error appears if you double click the qgis executable. Here is the error, in my case, if I try to access directly the executable: Try instead to start QGIS double clicking the corresponding batch file (in my case: qgis-dev-g7.4.0.bat, like bellow) and everything will be ok.
Can you create a custom function in QGIS?
With the Function Editor you are able to define your own Python custom functions in a comfortable way. The function editor will create new Python files in qgis2pythonexpressions and will auto load all functions defined when starting QGIS. Be aware that new functions are only saved in the expressions folder and not in the project file.
Where do I find the expressions file in QGIS?
The Function Editor tab The function editor will create new Python files in.qgis2\\python\\expressions folder and will auto load all functions defined when starting QGIS. Be aware that new functions are only saved in the expressions folder and not in the project file.
What does the customs group do in QGIS?
The Customs group lists the functions created or imported by the user. There are many other groups, listed below. This group contains operators (e.g., +, -, *). Note that for most of the mathematical functions below, if one of the inputs is NULL then the result is NULL.
How do I start QGIS on my computer?
Start QGIS¶ Start QGIS by typing “QGIS” at a command prompt, or if using a precompiled binary, by using the Applications menu. Start QGIS using the Start menu or desktop shortcut, or double click on a QGIS project file. Double click the icon in your Applications folder.
Is there a problem with QGIS 3.7 Dev?
I have a problem with my OSGeo4W64 installation, specifically QGIS 3.7 dev. When I start QGIS I get the following error: Ooops, looks like an error loading QGIS. Details: Could not load qgis_app.dll Windows Error: The specified module could not be found.
How to add a raster layer to QGIS?
Start QGIS using the Start menu or desktop shortcut, or double click on a QGIS project file. Double click the icon in your Applications folder. Click on the Add Raster Layer icon. Browse to the folder qgis_sample_data/raster/, select the ERDAS IMG file landcover.img and click [Open].
Is the GDAL plugin available on the command line?
These tools are available when the plugin is installed and activated. The GDAL library consists of a set of command line programs, each with a large list of options. Users comfortable with running commands from a terminal may prefer the command line, with access to the full set of options.
What’s the difference between QGIS 3 and QGIS-Dev?
Even more confusing: I have installed both qgis-dev (3.5) and qgis (3.4.4). qgis-dev does start even if I double-click the executable (.exe) and qgis does NOT start (same error) when double-clicking the batchfiles as mentionend above. No way to make QGIS 3 start. The *.env files and the batchfiles for qgis and qgis-dev look allmost the same.
Is there an error in QGIS 3.4.4 installer?
Right after uninstalling and re-installing QGIS 3.4.4-2 using OSGEO4W Installer trying to start QGIS 3.4.4 I encounter the following error message: The first entry in the PATH variable points to the referred qgis_app.dll.