Error in AT2 driver - 0 length PDU

Has anyone ever seen this before ?

2002-12-03 22:22:30 [12] DEBUG: AT2[087xxxxxxx]: --> AT+CPMS?^M
2002-12-03 22:22:31 [12] DEBUG: AT2[087xxxxxxx]: <-- +CPMS:
"SM",2,25,"SM",2,25,"SM",2,25
2002-12-03 22:22:33 [12] DEBUG: AT2[087xxxxxxx]: <-- OK
2002-12-03 22:22:33 [12] DEBUG: AT2[087xxxxxxx]: 2 messages waiting in
memory
2002-12-03 22:22:33 [12] DEBUG: AT2[087xxxxxxx]: --> AT+CMGR=1^M
2002-12-03 22:22:33 [12] DEBUG: AT2[087xxxxxxx]: <-- +CMGR: 0,,122
2002-12-03 22:22:33 [12] DEBUG: AT2[087xxxxxxx]: <--
0791538386000200040C9153838624877200002021302222310075D2F4780D4A83E8E877FD8C
A683C6EF373BFD0691D3653228ED068541E3B01C349687E7685018347ED7E1EC32E86D06E5CB
61F91C143EBF432D1008040281402010080402814020765A0F4ABB41E3F01C5D66834075D0FC
0D92BFC76B90380FA2A3CBA07B381F02
2002-12-03 22:22:33 [12] DEBUG: AT2[087xxxxxxx]: Numeric sender
(international) <+087xxxxxxx>
2002-12-03 22:22:33 [12] DEBUG: AT2[087xxxxxxx]: <-- OK
2002-12-03 22:22:33 [12] DEBUG: AT2[087xxxxxxx]: --> AT+CMGD=1^M
2002-12-03 22:22:34 [12] DEBUG: AT2[087xxxxxxx]: <-- OK
2002-12-03 22:22:34 [12] DEBUG: AT2[087xxxxxxx]: --> AT+CMGR=2^M
2002-12-03 22:22:34 [12] DEBUG: AT2[087xxxxxxx]: <-- +CMGR: 0,,0
2002-12-03 22:22:34 [12] DEBUG: AT2[087xxxxxxx]: <-- OK
2002-12-03 22:22:34 [12] ERROR: AT2[087xxxxxxx]: got +CMT but pdu_extract
failed

The read from SIM index 2 returns 0 length !. Am I correct in
assuming that the messages should be in locations 1 and 2 or do
you have to cycle through the 25 locations looking for the
messages ? In which the ERROR: is not really an error - ie.
an empty location is valid ?


Its also possible that the SIM is gradually dying - the modem is doing
thousands
of messages/week and SIMs die on a regular basis.