Onstat -g sts

Hello all, I have this problem : 01:08:38 Found during mt_shm_free 4 01:08:38 Pool 'sscpool3' (0x7000000e0e22040) 01:08:38 Bad block header 0x7000000f7fd1000 blk-64 07000000f7fd0fc0: 00000000 00000000 00000000 00000000 ........ ........ 07000000f7fd0fd0: 00000000 00000000 01000000 00000000 ........ ........07000000f7fd0fe0: 67726561 74657274 68616e6f 72657175 greatert hanorequ 07000000f7fd0ff0: 616c0000 00000000 00000001 00000000 al...... ........ blk+64 07000000f7fd1000: ffffffff ffffffff 07000000 f7fd1400 ........ ........ 07000000f7fd1010: 07000000 ece36800 00000000 00000400 ......h. ........ 07000000f7fd1020: 0e000001 e4e08401 07000000 fed69028 ........ .......( 07000000f7fd1030: 07000000 e0e22848 0e000001 dfb8b871 ......(H .......q 01:08:38 Can't find corrupted block's previous block 01:08:38 01:08:38 IBM Informix Dynamic Server Version 9.40.FC4W1 Software SerialIBM Informix Dynamic Server Version 9.40.FC4W1 -- On-Line -- Up 1 days 06:56:1 6 -- 7668384 Kbytes Number AAA#B000000 01:08:38 Assert Failed: Memory block header corruption detected in mt_shm_free4 01:08:38 Who: Session(25299, mdz@broskev.cpp.cz, 561080,700000104e76b98) Thread(46219, sqlexec, 7000000f6763940, 3) and onstat -g sts : Stack usage: TID Total Max Current Thread Name bytes % bytes % 2 32768 1928 5 1248 3 lio vp 0 3 32768 1928 5 1248 3 pio vp 0 4 32768 4591 14 1248 3 aio vp 0 5 131072 32139 24 1248 0 msc vp 0 6 32768 4591 14 1248 3 aio vp 1 7 32768 4591 14 1248 3 aio vp 2 8 32768 1928 5 1248 3 aio vp 3 9 65536 14255 21 3440 5 main_loop() 10 32768 6079 18 1088 3 sm_poll 11 32768 32767 99 504403157475280432 -149533583789081 soctcppoll 12 32768 32767 99 504403157475382832 -149533583788768 soctcppoll 13 32768 32767 99 504403157475489328 -149533583788443 soctcppoll 14 32768 19999 61 4720 14 sm_listen . . 42461 32768 3723 11 1072 3 kaio 42462 32768 3304 10 1072 3 kaio 42471 32768 3723 11 1072 3 kaio 46081 262144 262143 99 504403157842763376 -18691697833451 sqlexec 46226 262144 18335 6 2864 1 sqlexec Regards, V.Boura