Unable to change impedance

Discussion created by swthurmond on Apr 25, 2011
Latest reply on May 4, 2011 by eunsu.lee
I am using Network Analyst for the first time and am trying to create a service layer.  Everything works well except that in the layer properties, I cannot change the Impedance from Length.  It needs to be the time and that choice is not available.  The network dataset has been built and I can create polygons based on distance without any issues.

Thanks in advance for any help.