Is it possible to convert to a network aware shapefile?

Discussion created by Schack on Nov 18, 2010
Latest reply on Nov 22, 2010 by Schack
I have line data that I want to start using as a network.  I know when you first create a shapefile, you can make it so that your linework will have M values which allow you to store route data. 

Does anyone know if there's a way to convert a line shapefile that didn't start out with M values, into one that does have M values?