Assert failed - memory block header corruption IDS 9.4UC2 Solaris 9

I am moving from IDS 7.3 to IDS9.4UC2. In the first days of testing the engine crashed. Is 9.4UC2 the latest for Solaris 9? 12:17:10 Assert Failed: Memory block header corruption detected in mt_shm_free1 12:17:10 IBM Informix Dynamic Server Version 9.40.UC2 12:17:10 Who: Session(84, root@emco10, 5305, 19c4ace0) Thread(95, sqlexec, 19c1f828, 1) File: mtshpool.c Line: 3256 12:17:10 Results: Unable to repair pool 12:17:10 Action: Please notify IBM Informix Technical Support. 12:17:10 stack trace for pid 720 written to /tmp/af.4475505 12:17:10 See Also: /tmp/af.4475505, shmem.4475505.0 12:17:15 Memory block header corruption detected in mt_shm_free 1 12:17:15 Assert Failed: No Exception Handler 12:17:15 IBM Informix Dynamic Server Version 9.40.UC2 12:17:15 Who: Session(84, root@emco10, 5305, 19c4ace0) Thread(95, sqlexec, 19c1f828, 1) File: mtex.c Line: 431 12:17:15 Results: Exception Caught. Type: MT_EX_OS, Context: mem 12:17:15 Action: Please notify IBM Informix Technical Support. 12:17:15 stack trace for pid 720 written to /tmp/af.4475505 12:17:15 See Also: /tmp/af.4475505 12:17:19 mtex.c, line 431, thread 95, proc id 720, No Exception Handler. 12:17:20 The Master Daemon Died 12:17:20 PANIC: Attempting to bring system down af: 12:17:10 Found during mt_shm_free 1 12:17:10 Pool 'dictpool' (0x1a07d020) 12:17:10 Bad block header 0x1ad14000 blk-64 1ad13fc0: 80000000 0000000f 6465665f 7265706c ........ def_repl 1ad13fd0: 5f636e74 79706500 01000004 00400000 _cntype. .....@.. 1ad13fe0: 80000000 80000000 00000010 6465665f ........ ....def_1ad13ff0: 6275696c 645f636e 74797065 01000004 build_cn type.... blk+64 1ad14000: 00400000 80000000 80000000 0000000f .@...... ........ 1ad14010: 6465665f 6e657374 5f636e74 79706500 def_nest _cntype. 1ad14020: 01000004 00400000 80000000 80000000 .....@.. ........ 1ad14030: 00000010 6465665f 6d657267 655f636e ....def_ merge_cn 12:17:10 Multiple block errors found 12:17:10 12:17:10 Assert Failed: Memory block header corruption detected in mt_shm_free1 12:17:10 Who: Session(84, root@emco10, 5305, 19c4ace0) Thread(95, sqlexec, 19c1f828, 1) File: mtshpool.c Line: 3256 12:17:10 Results: Unable to repair pool 12:17:10 Action: Please notify IBM Informix Technical Support. 12:17:10 Stack for thread: 95 sqlexec base: 0x1acfe000 len: 36864 pc: 0x0071190c tos: 0x1ad04d98 state: running vp: 1 0x00710cf0 (oninit)afhandler(0xb74800, 0x9eb400, 0x19a09678, 0x1, 0x401, 0x401) 0x00710464 (oninit)affail_interface(0x1ad05528, 0xae6e74, 0x19a09678, 0x1, 0xae6 e8c, 0xcb8) 0x007071e8 (oninit)recover_pool_bad_block(0x9ea000, 0x1a07d02c, 0xae6e74, 0xffff ffff, 0x1a07d020, 0x1ad14000) 0x00704780 (oninit)mt_shm_free(0x1a07d02c, 0x1a07d02c, 0xae6824, 0x0, 0x1ad14018 , 0x0)