[ns] make: *** No rule to make target `gen/version.o', needed by `ns'. Stop.

[NS]

Hi has anyone got any ideas? im stuck on the makefile on a new box
 This is the last bit.... any ideas please?

 g++ -c -Wall  -DTCP_DELAY_BIND_ALL -DNO_TK -DTCLCL_CLASSINSTVAR
 -DNDEBUG -DLINUX_TCP_HEADER -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=std -DUSE_SINGLE_ADDRESS_SPACE
 -Drng_test  -I. -I/Users/student3/ns/tclcl-1.19
 -I/Users/student3/ns/otcl-1.13 -I/Users/student3/ns/include
 -I/Users/student3/ns/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 packmime/packmime_ranvar.o
 packmime/packmime_ranvar.cc
 make: *** No rule to make target `gen/version.o', needed by `ns'.  Stop.



 Thanking you
 Mark