Imp error: ORACLE error 1400 encountered

[mahajanakhil198]

Lets try a step-by-step guide...

Please follow guide and spool off eveything you do - in case something happens we will appreciate to see whole session.

1- Drop MAM_ASSETS table
2- Create MAM_ASSETS - be sure no column has NOT NULL option
3- desc MAM_ASSETS
4- import MAM_ASSETS with options... ignore=y indexes=n constraints=n
5- desc MAM_ASSETS

Still receiving the same error.
But the NOT NULL constraints for columns don't come after importing rows of table. Attached is the spool file.
Some 8,28,000 rows get imported and the following error gets generated repetitively for 20-25 times during import.

Import: Release 10.1.0.2.0 - Production on Mon May 17 17:35:34 2010

Copyright (c) 1982, 2004, Oracle. All rights reserved.


Connected to: Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options

Export file created by EXPORT:V09.02.00 via conventional path

Warning: the objects were exported by SYSTEM, not by you

import done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character set
. . importing table "MAM_ASSETS"
IMP-00019: row rejected due to ORACLE error 1400
IMP-00003: ORACLE error 1400 encountered
ORA-01400: cannot insert NULL into ("QUARKDMS"."MAM_ASSETS"."INDEX_SOURCE")
Column 1 413212
Column 2 65678
Column 3 65780
Column 4 21
Column 5
Column 6 2
Column 7 0
Column 8 1
Column 9 1
Column 10 1
Column 11 0
Column 12 412553
Column 13 4
Column 14
Column 15 7 5 E 20 19
Column 16 7 5 e 20 19
Column 17
Column 18
Column 19 25902
Column 20 2
Column 21 30-AUG-2002:13:26:54
Column 22
Column 23 30-AUG-2002:13:26:54
Column 24
Column 25 10-SEP-2002:10:14:13
Column 26 JPEG
Column 27 14-OCT-2005:14:49:58
Column 28 jpeg
Column 29 8BIM
Column 30
Column 31 8bim
Column 32 65780
Column 33 65715
Column 34 65874
Column 35 65617
Column 36 005400010108000000010000000100000009158700000A3C00...
Column 37
Column 38 14-OCT-2005:14:49:58
Column 39 1
Column 40 65874
Column 41 02-SEP-2002:13:28:51
Column 42
Column 43
Column 44 005400010208000000010000000100000025B2330008AA8200...
Column 45 US


No NOT NULL on INDEX_SOURCE, still it is not allowing import of rows.
PS: INDEX_SOURCE is a BLOB column.