9.3.0 Exiting Due to assertion failure

[zain011 at emirates.net.ae]

I'm running a recursive named version 9.3.0 on a Solaris 9 sparc. The 
named logged the following messages before existing.

10-Jan-2005 10:35:33.098 name.c:1215: REQUIRE((((name) != 0) && 
(((const isc__magic_t *)(name))->magic == ( (('D') << 24 | ('N') << 16 
| ('S') << 8 | ('n')))))) failed

10-Jan-2005 10:35:33.099 exiting (due to assertion failure)

What could be the reason for it to happen? 

Thanks & Regards,
--Zain