v.kernel is missing under Processing Toolbox GRASS GIS 7 commands

Question

I installed the QGIS Standalone Installer Version 2.14 (64bit), that automatically contains GRASS 7.0.4. I created a map with several layers and rasters in the program called QGIS Desktop 2.14.3 with GRASS 7.0.4.

I need one tool from Processing -> Toolbox -> GRASS GIS 7 commands -> Vector -> v.kernel => but is missing there. All the other vectors (v.XY) work well. Because I found v.kernel under GRASS commands, I activated it in the Processing options.

Under GRASS commands -> Vector -> v.kernel appears but is not working, none of the vectors (v.XY) is :

When I click on Enable additional providers at the bottom of the Processing Toolbox I see the Processing options :

The path for the GRASS7 folder is right. I put the same for the GRASS folder. But I cannot found the Msys folder in whole PC.

When i check Plugins -> Manage and Install Plugins -> GRASS7 is installed.

When I go to XY\QGIS Essen\apps\grass\grass-7.0.4\bin, I can see v.kernel.

Did anyone face the same problem?

Basically I have two questions:

1) Why v.kernel is not under GRASS GIS 7 commands? And how can I have it?

2) Why v.kernel and all the other vectors (v.XY) under GRASS commands are not working?

Answer 1

In GRASS GIS 7, there are two v.kernel tools: v.kernel.rast and v.kernel.vector. These tools are available in the current development version of QGIS. (QGIS 2.14.2 contains fewer algorithms and v.kernel is missing.)

In the provider settings, the "GRASS commands" section is used to configure GRASS GIS 6 and the "GRASS GIS 7 commands" section GRASS GIS 7. As far as I know, GRASS GIS 7 doesn't need an msys folder, so if you've never had 6 installed, you won't find any on your computer.

If you haven't installed GRASS GIS 6 on your computer, try deactivating GRASS 6 in your Processing options.

You can verify if a certain algorithm is included by checking the algorithm description folder in the Processing installation. In an OSGeo4W install that is:

C:\OSGeo4W64\apps\qgis-dev\python\plugins\processing\algs\grass7\description

If this folder does not contain a file called v.kernel.rast.txt, we could try if adding it fixes the issue.

Answer 2

Even with GRASS 6 deactivated, the missing msys folder is a real issue. As a work around, I appeased the msys gods by creating the missing (empty) folder in the default msys directory. (Since you don't need an msys folder to run GRASS 7).

Make sure, like me, if you're running GRASS algorithms through the graphic modeler, to verify that they running through GRASS 7, not 6.

Hope this helps.