Getting Dumps while extracting the data source

Hi,

I am having an issue while extracting the data source – 2LIS_03_BF .  After the enhancement , when I am executing RSA3 , with data records up to 10000 , it is fetching records, but with 100000 or more records , it is giving a dump.

Runtime Errors         CONNE_IMPORT_WRONG_COMP_LENG
Exception              CX_SY_IMPORT_MISMATCH_ERROR
Date and Time          15.05.2012 12:25:28

Short text
     Error when attempting to IMPORT object "MC03BF0_TAB".

What happened?
     Error in the ABAP Application Program

     The current ABAP program "SAPLMCEX" had to be terminated because it has
     come across a statement that unfortunately cannot be executed.

What can you do?
     Note down which actions and inputs caused the error.

     To process the problem further, contact you SAP system
     administrator.

     Using Transaction ST22 for ABAP Dump Analysis, you can look
     at and manage termination messages, and you can also
     keep them for a long time.

Error analysis
     An exception occurred that is explained in detail below.
     The exception, which is assigned to class 'CX_SY_IMPORT_MISMATCH_ERROR', was
      not caught in
     procedure "MCEX_BW_LO_API" "(FUNCTION)", nor was it propagated by a RAISING
      clause.
     Since the caller of the procedure could not have anticipated that the
     exception would occur, the current program is terminated.
     The reason for the exception is:
     When importing the object "MC03BF0_TAB", the component 80 in the dataset
     had a different length from the corresponding component of the
     target object in the program "SAPLMCEX".

     The length is 120 in the dataset, but 200 in the program.

Please guide.