here is my problem:
[zhouzhou@server169 ~]$ SeaDas/run/scripts/modis_L1B.py ./2003a/A20031201_1.L1A_LAC ./GEO-2003/01/A20031201_1.GEO -o A20031201.L1B_LAC
(-1, -1)
here 3
MYD_PR02 version 6.1.3b built on Apr  8 2011, at 09:22:09
ERROR: MODIS L1B processing failed.
Please examine the LogStatus and LogUser files for more information.

and the LogStatus shows :
BEGIN_PGE: Thu Nov  6 20:53:46 2014
MSG_TAG: 11
FILE: /home/zhouzhou/LogStatus.A20031201.L1B_LAC
LOGGING: status message logging enabled
TRACE_LEVEL: tracing disabled
PID_LOGGING: disabled
DISABLED_LEVELS: none
DISABLED_SEEDS: none
DISABLED_CODES: none
THREAD-SAFE MODE:  disabled
TOOLKIT_VERSION: SCF  TK5.2.17
****************************************

TDLUT_GetAlgorithm():MODIS_F_READ_ERROR:295817219
Could not find SDS "Sigma_RVS_RSB" in the file.
Call to SDnametoindex() failed.
This is most likely due to an invalid file.
(does not meet file specs or is corrupted)

Read_L1B_SDS_LUT():MODIS_F_NOK:295817224
The algorithm flag is invalid for LUT "Sigma_RVS_RSB".

Read_LUT_Tables():MODIS_F_NOK:295817224
Call to Read_L1B_SDS_LUT() failed.
File LUN:  700050
File type: Reflective_Lookup_Tables_file

:MODIS_F_NOK:295817224
Fatal error(NOK) running...MOD_PR02. TIME:Thu Nov  6 20:53:46 2014
  Operator Actions:
  Contact MCST.

I've  tried to update the LUTs, but it still didn't works. And I also reinstalled seadas for many times, it is just like this.can you hell me? thanks a lot

Please see
http://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?pid=19859;hl=Sigma_RVS_RSB#pid19859

From your build date, it looks like you're using SeaDAS v6.2.  If you must use that version, you'll need to reinstall a compatible lookup table.

I believe we don't distribute old LUTS individually, but you can download the aqua package at ftp://samoa.gsfc.nasa.gov/seadas/seadas_6.2/seadas_modisa.tar.gz .

thank you,gwyn. I've solved the problem, thanks for your advice