I'm trying to run a network analysis in Grass 7.0 following this tutorial: http://www.ing.unitn.it/~grass/docs/tutorial_641_en/htdocs/esercitazione/network_analysis/node3.html
Since I'm new to Grass I already got stuck when trying to create a new layer in order to eliminate duplicate categories from my lines layer. The query I use is:
v.category --overwrite --verbose input=network_connect output=network_cat3 type=line layer=3 cat=1
The output is:
ERROR: Required parameter not set: (Action to be executed.) (Fri Aug 19 16:46:37 2016) Command executed (0 Sek)
I translated this from German, so if anything in the Error message seems fishy, that's my bad.