I am facing the following error repeatedly while doing import using imp:


. . 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
IMP-00019: row rejected due to ORACLE error 1400



I searched google, it's of no help in my case. I also disabled constraints import. Though constraints get enabled after importing rows, still I cleared my doubt. What else can be done?