ABAP Runtime Error while J2IUN

Dear All,

I got this ABAP run time error while running J2IUN

untime Errors         DYNPRO_FIELD_CONVERSION
ate and Time          05.05.2010 12:17:41



Short text
    Conversion error



What happened?
    The current screen processing action was terminated since a situation
    occurred where the application could not continue.
    This is probably due to an error in the ABAP program or in the current
    screen.





What can you do?
    Note which actions and input led to the error.

    For further help in handling the problem, contact your SAP administrator
    .

    You can use the ABAP dump analysis transaction ST22 to view and manage
    termination messages, in particular for long term reference.

Please help me !

Regards,

Pardeep Malik