Smsbox crash - here is the log

Sometimes it happens for the smsbox to crash:
here is the log of smsbox.log

2004-07-05 14:45:14 [8447] [3] PANIC: gwlib/octstr.c:2332: seems_valid_real: Assertion `ostr->data != NULL' failed. (Called from gw/smsbox.c:2211:smsbox_req_handle.)
2004-07-05 14:45:14 [8447] [3] PANIC: smsbox [0x80753ed]
2004-07-05 14:45:14 [8447] [3] PANIC: smsbox [0x807b649]
2004-07-05 14:45:14 [8447] [3] PANIC: smsbox [0x8076c5b]
2004-07-05 14:45:14 [8447] [3] PANIC: smsbox [0x8050f34]
2004-07-05 14:45:14 [8447] [3] PANIC: smsbox [0x8051923]
2004-07-05 14:45:14 [8447] [3] PANIC: smsbox [0x8053629]
2004-07-05 14:45:14 [8447] [3] PANIC: smsbox [0x806b3e0]
2004-07-05 14:45:14 [8447] [3] PANIC: /lib/tls/libpthread.so.0 [0x40069484]
2004-07-05 14:45:14 [8447] [3] PANIC: /lib/tls/libc.so.6(__clone+0x57) [0x420df147]

Can anyone help ?