Item import child organization fails with no error message

Hi,

I am running the Item Import program, it's completing without giving any error message .
There is no change in Process_flag which remains as 1.

The Item import is completing successfully for the master organization.
I am Testing the basic item import with minimum columns populated.

===================================================================
Argument 1 (ORG_ID) = 29
Argument 2 (ALL_ORG) = 2
Argument 3 (VAL_ITEM_FLAG) = 1
Argument 4 (PRO_ITEM_FLAG) = 1
Argument 5 (DEL_REC_FLAG) = 2
Argument 6 (PROCESS_SET) = 1
Argument 7 (CREATE_UPDATE) = 1
Argument 8 (SOURCE_ORG_ID) = -999

===================================================================
+---------------------------------------------------------------------------+
Start of log messages from FND_FILE
+---------------------------------------------------------------------------+
[29-APR-2013 11:18:34] **> INVPOPIF: *** Starting a new IOI process: run_mode=1 all_org=2
[29-APR-2013 11:18:34] **> INVPOPIF.inopinp_open_interface_process: org_id = 29