Hi, I tried a DM example script (tcl/ex/newmcast/mcast3.tcl)using the latest ns snapshot (downloaded last week), and it is working fine. all the join/prune are ok. I also have the chance to look into the DM.tcl file, from my point of view, it should be no problem to run. Maybe you can describe what problem you've encountered to the mailing list. shuqian