Re:cannot create core dump file?

Hi all, i attemp to create core dump file since i encountered segmentation fault error. i have followed the steps in doc/bug, i.e. ./configure --enable--developer make make install ulimit -c unlimited then i ran the daemon using './radiusd -XXX' under /usr/local/radius/sbin as my current directory.but afterwards there's no core dump file generated in my currenct dir. how and where can i get the core dump file? any advise? thanks in advance. regards, Pang KW