Hi, all, I am trying to use the Span package provided by : http://pdos.csail.mit.edu/~benjie/span/span_ns.html I have some problems. 1) I tried span-2.28-patch.tar.gz under ns-2.28 using Linux, but it could not successfully compiled. Is the patch must be installed under windows + cygwin? What kind of changes do I need to make? 2) I tried span_ns_1.1.tar.gz, span_ns_1.tar.gz and span_ns_0.tar.gz under ns2.1b7a. I followed the instruction on the webpage. When I run "autoheader", I always get the error:AC_CONFIG_HEADERS not found. I tried lower version of autoheader, it comes "srand not defined, ...etc" Could you give me some suggestions to make Span working? Anyone has experience on this? thanks a lot. damon _________________________________________________________________ Share life as it happens with the new Windows Live. http://www.windowslive.com/share.html?ocid=TXT_TAGHM_Wave2_sharelife_012008