Hi.. i've bee struggling for these past 1 week to get the informix server running.
I even can't execute the oninit command.. it always give me error
Rights for non-DOD U.S. Government Departments and Agencies are as set
forth in FAR 52.227-19(c)(1,2).
pri:informix 21> onmode -m
shared memory not initialized for INFORMIXSERVER 'sapp01p01tcp'
pri:informix 22> oninit
oninit: Fatal error in shared memory initialization
pri:informix 23>

think my hair start falling

anyone can hel me ?
Thank you

Please paste some fail log in your online log file for more information,
make it easy

ICQ#24681071

ipcs

07:34:02 Results: Log record (OLDRSAM:PBDELETE) in log 319867, offset 0x131f400 was not rolled back
07:34:02 Action: Use 'onlog' to view the transaction and repair manually.
07:34:02 stack trace for pid 9894 written to /tmp/af.40bbd9f
07:34:09 See Also: /tmp/af.40bbd9f, shmem.40bbd9f.32
07:34:09 Error writing '/tmp/shmem.40bbd9f.32' errno = 28
07:34:09 Assert Failed: Rollback error 126
07:34:09 Informix Dynamic Server Version 7.31.FD2X2
07:34:09 Who: Session(16, informix@pri, 0, 688513440)
Thread(35, xchg_1.1, c00000002906b590, 1)
File: rsextlog.c Line: 1448
07:34:09 Results: Log record (OLDRSAM:PBDELETE) in log 319867, offset 0x131f400 was not rolled back
07:34:09 Action: Use 'onlog' to view the transaction and repair manually.
07:34:09 stack trace for pid 9894 written to /tmp/af.40bbd9f
07:34:16 See Also: /tmp/af.40bbd9f, shmem.40bbd9f.33
07:34:16 Error writing '/tmp/shmem.40bbd9f.33' errno = 28
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 70410, type = OLDRSAM:PBINSERT(38), trans = 68
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 70410, type = OLDRSAM:PBINSERT(38), trans = 68
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 7105c, type = OLDRSAM:PBINSERT(38), trans = 96
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 7105c, type = OLDRSAM:PBINSERT(38), trans = 96
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 73018, type = OLDRSAM:PBINSERT(38), trans = 96
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 73018, type = OLDRSAM:PBINSERT(38), trans = 96
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 73428, type = OLDRSAM:PBDELETE(39), trans = 68
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 73428, type = OLDRSAM:PBDELETE(39), trans = 68
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 74450, type = OLDRSAM:PBDELETE(39), trans = 96
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 74450, type = OLDRSAM:PBDELETE(39), trans = 96
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 75478, type = OLDRSAM:PBDELETE(39), trans = 49
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 75478, type = OLDRSAM:PBDELETE(39), trans = 49
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 764a0, type = OLDRSAM:PBDELETE(39), trans = 68
07:34:16 Rollforward of log record failed. iserrno = 126
07:34:16 Log Record: log = 319868, pos = 764a0, type = OLDRSAM:PBDELETE(39), trans = 68
07:34:16 Assert Failed: Rollback error 126
07:34:16 Informix Dynamic Server Version 7.31.FD2X2
07:34:16 Who: Session(16, informix@pri, 0, 688513440)
Thread(35, xchg_1.1, c00000002906b590, 1)
File: rstrans.c Line: 2254
07:34:16 Results: Log record (OLDRSAM:PBDELETE) in log 319867, offset 0x131c018 was not rolled back
07:34:16 Action: Use 'onlog' to view the transaction and repair manually.
07:34:16 stack trace for pid 9894 written to /tmp/af.40bbd9f
07:34:23 See Also: /tmp/af.40bbd9f, shmem.40bbd9f.34
07:34:23 Error writing '/tmp/shmem.40bbd9f.34' errno = 28
07:34:23 Assert Failed: Rollback error 126
07:34:23 Informix Dynamic Server Version 7.31.FD2X2
07:34:23 Who: Session(16, informix@pri, 0, 688513440)
Thread(35, xchg_1.1, c00000002906b590, 1)
File: rsextlog.c Line: 1448
07:34:23 Results: Log record (OLDRSAM:PBDELETE) in log 319867, offset 0x131c018 was not rolled back
07:34:23 Action: Use 'onlog' to view the transaction and repair manually.
07:34:23 stack trace for pid 9894 written to /tmp/af.40bbd9f
07:34:29 See Also: /tmp/af.40bbd9f, shmem.40bbd9f.35
07:34:29 Error writing '/tmp/shmem.40bbd9f.35' errno = 28
07:34:29 Rollforward of log record failed. iserrno = 126
07:34:29 Log Record: log = 319868, pos = 7707c, type = OLDRSAM:PBDELETE(39), trans = 96
07:34:29 Rollforward of log record failed. iserrno = 126
07:34:29 Log Record: log = 319868, pos = 7707c, type = OLDRSAM:PBDELETE(39), trans = 96
07:34:29 Rollforward of log record failed. iserrno = 126
07:34:29 Log Record: log = 319868, pos = 77420, type = OLDRSAM:PBINSERT(38), trans = 68
07:34:29 Rollforward of log record failed. iserrno = 126
07:34:29 Log Record: log = 319868, pos = 77420, type = OLDRSAM:PBINSERT(38), trans = 68
07:34:29 Rollforward of log record failed. iserrno = 126
07:34:29 Log Record: log = 319868, pos = 78448, type = OLDRSAM:PBDELETE(39), trans = 49
07:34:29 Rollforward of log record failed. iserrno = 126
07:34:29 Log Record: log = 319868, pos = 78448, type = OLDRSAM:PBDELETE(39), trans = 49

-28 No space left on device.

An operating system error code with the meaning shown was
unexpectedly returned to the database server. This probably reflects
either a database table or an ASCII output file that has filled the
available disk space. Look for operating system error messages that
may give more information.

BUFFER = Physical Memory Size * 25%

I think there something worng about your database logical log or previous malform transaction ,so your database can't rollforward some transactions.
Do you have any backup ?