Every time I enable GRASS plugin in QGIS (Plugins -> Manage Plugins -> GRASS), I got a message: Exception - G_getenv(): Variable GISDBASE not set.
I googled and found some information here but don't know how to "unset GISRC".
Anyone please show me how to do it?
I solved it. I don't know if every step below is necessary but here's what I've done:
Now I can open QGIS and enable GRASS plugin with no problem.