problem in instance creation on AIX6.1

./db2icrt -u db2inst db2inst

diaglog contains following

2009-11-05-13.14.14.243095+330 I1281A714 LEVEL: Severe
PID : 413802 TID : 1 PROC : db2fm
INSTANCE: db2inst NODE : 000
EDUID : 1
FUNCTION: DB2 UDB, base sys utilities, sqleInitApplicationEnvironment, probe:32
MESSAGE : ZRC=0xFFFFE871=-6031
DATA #1 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes
sqlcaid : SQLCA sqlcabc: 136 sqlcode: -6031 sqlerrml: 3
sqlerrmc: 0 3
sqlerrp : SQLFRCFG
sqlerrd : (1) 0x00000000 (2) 0x00000000 (3) 0x00000000
(4) 0x00000000 (5) 0x00000000 (6) 0x00000000
sqlwarn : (1) (2) (3) (4) (5) (6)
(7) (8) (9) (10) (11)
sqlstate:

2009-11-05-13.14.14.310540+330 I1996A602 LEVEL: Warning
PID : 413802 TID : 1 PROC : db2fm
INSTANCE: db2inst NODE : 000
EDUID : 1
FUNCTION: DB2 Common, Fault Monitor Facility, fmGetInstallPath, probe:30
MESSAGE : ECF=0x90000397=-1879047273=ECF_FM_FAIL_TO_GET_GLOBAL_REG_INST_REC
Failed to get the instance record from the global registry file
CALLED : DB2 Common, Generic Registry, GenRegBin::Get
RETCODE : ECF=0x900001F6=-1879047690=ECF_GENREG_NO_MATCHING_RECORD_FOUND
No matching record found
DATA #1 : String, 7 bytes
db2inst

"db2diag.log" 36820 lines, 1673272 characters