i do this step :
I followed the steps you specified for installing the GPRS patch. In step 2, we need to apply the noah extension, at the website you provided it said that: :: install the appropriate ;-) version of ns :: make clean; rm config.cache; rm Makefile :: unzip the extension archive to a temporary directory :: copy sdist.cc, sdist.h, wireless-phy.cc, wireless-phy.h, cmu-trace.cc, mip.h, mip-reg.cc, Makefile.in, noah/ to the ns directory :: copy noah.tcl to tcl/mobility and ns-default.tcl and ns-lib.tcl to tcl/lib :: run ./configure and make and when i run make the error appear: config.status: creating autoconf.h config.status: autoconf.h is unchanged [EMAIL PROTECTED]:/usr/local/ns2/ns-allinone-2.31/ns-2.31$ make Makefile:225: *** Recursive variable `OBJ_STL' references itself (eventually). Stop. -- AZHAR MOHD ARIS