Hi, I am trying to build ns-2 using ns-allinone-2.31, and am getting a core dump: g++ -c -O2 -Wall -DTCP_DELAY_BIND_ALL -DNO_TK -DTCLCL_CLASSINSTVAR -DNDEBUG -D__svr4__ -DSOLARIS_MIN_MAX -DUSE_SHM -DHAVE_LIBTCLCL -DHAVE_TCLCL_H -DHAVE_LIBOTCL1_13 -DHAVE_OTCL_H -DHAVE_LIBTK8_4 -DHAVE_TK_H -DHAVE_LIBTCL8_4 -DHAVE_TCL_H -DHAVE_CONFIG_H -DNS_DIFFUSION -DSMAC_NO_SYNC -DCPP_NAMESPACE=no -DUSE_SINGLE_ADDRESS_SPACE -Drng_test -I. -I/auto/aic_dev/szeng/ns-allinone-2.31/tclcl-1.19 -I/auto/aic_dev/szeng/ns-allinone-2.31/otcl-1.13 -I/auto/aic_dev/szeng/ns-allinone-2.31/include -I/auto/aic_dev/szeng/ns-allinone-2.31/include -I/usr/include/pcap -I./tcp -I./sctp -I./common -I./link -I./queue -I./adc -I./apps -I./mac -I./mobile -I./trace -I./routing -I./tools -I./classifier -I./mcast -I./diffusion3/lib/main -I./diffusion3/lib -I./diffusion3/lib/nr -I./diffusion3/ns -I./diffusion3/filter_core -I./asim/ -I./qs -I./diffserv -I./satellite -I./wpan -o gen/ns_tcl.o gen/ns_tcl.cc ./common/ptypes2tcl > gen/ptypes.cc Segmentation Fault - core dumped make: *** [gen/ptypes.cc] Error 139 Ns make failed! See http://www.isi.edu/nsnam/ns/ns-problems.html for problems Any help is appreciated. -Shengyou