<param name="Freeswitch-Hangupcause" variable="bridge_hangup_cause" format="%s"/>

in xml_radius.conf in acct_end section gives

freeswitch[27347]: segfault at 0 ip 00007ffedf175ee2 sp 00007ffed5dc35d0 error 4 in libc-2.13.so[7ffedf13e000+180000]

So what is the alternative of getting hangup case if there is any?

M