Was there ever any resolution to this thread? I'm having similar problems in ArcGIS 10.2 trying to run a pretty simple Trace Geometric Network using type "Find Connected" in Model Builder. It's VERY slow and some times just crashes.
Is there any help documentation on setting up a trace geometric network using Model Builder?
but the documentation doesn't help me. As far as I can tell, I've followed the help instructions for using Trace Geometric Network in Model Builder, but the process takes a long time, it crashes or the output is empty.