Dops, I forgot another error ns: _o427 recv prune 0 157: can't read "messages(157)": no such element in array (Object set line 1) invoked from within "Agent/Mcast/Control set messages($m)" (procedure "_o427" line 2) (Agent/Mcast/Control recv line 2) invoked from within "_o427 recv prune 0 157" It seems like there is something wrong with pruing process..... thanks -James Kwon