[ns] No rule to make 'VERSION' in gen/version.c

Hi, I tried installing ns2.1b7 but when installing ns an error occurs stating make: *** No rule to make target `VERSION', needed by `gen/version.c' Stop: Ns failed.. Please give me a solution... Its urgent.../. Jayavignesh (Final year Engineering student)

[ns] No rule to make target `VERSION', needed by `gen/version.c'

Hi, I tried installing ns2.1b7 but when installing ns an error occurs stating make: *** No rule to make target `VERSION', needed by `gen/version.c' Stop: Ns failed.. Please give me a solution... Its urgent.../. Jayavignesh (Final year Engineering student)