Hi all, I've a problem while executing a MPLS example under ns-allinone-2.1b7a version in Linux Red HAt 6.2. The error message is the next one: _o3: unable to dispatch method MPLSnode while executing "$ns MPLSnode" invoked from within "set LSR2 [$ns MPLSnode]" (file "test-mpls.tcl" line 27) Thanks.