git-svn-id: https://svn.osgeo.org/grass/grass/trunk@72863 15284696-431f-4ddb-bdfa-cd5b030d7da7
@@ -104,6 +104,9 @@
#% description: The input raster map is a cost surface (direction surface must also be specified)
#% guisection: Cost surface
#%end
+#%rules
+#% required: start_coordinates, start_points
+#%end
import os
import sys