I am introducing myself to Qgis using the FOSS4Glabs :
I am facing a problem during the module 6 Lab of the GST102 series. I am trying to construct a network data set using the v.net included in the GRASS Tools. I keep receiving the same error: "Unable to open topology file for vector map "
If I ignore the problem and continue the manipulation, I receive the following error message:
I tried to rebuild the topology using the v.build, but it didn't change a thing.
Does anyone have an idea about what I should investigate?