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오랜만에 접속해서 질문먼저 드리게 되네여;;

아래 런타임 에러가 나는데 암만 제가 해봐도 저 에러는 안나는데;;참..

저 런타임 에러가 나는 원인은 어떤 경우가 있을까요??

Runtime Errors         OBJECTS_OBJREF_NOT_ASSIGNED
Exception              CX_SY_REF_IS_INITIAL
Date and Time          2011/02/09 09:31:50

 Error analysis
     An exception occurred that is explained in detail below.
     The exception, which is assigned to class 'CX_SY_REF_IS_INITIAL', was not
      caught in
     procedure "TRANSFER_DATA" "(FORM)", 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:
     You attempted to use a 'NULL' object reference (points to 'nothing')
     access a component (variable: "GRF_TABLE").
     An object reference must point to an object (an instance of a class)
     before it can be used to access components.
     Either the reference was never set or it was set to 'NULL' using the
     CLEAR statement.

 How to correct the error

     If the error occures in a non-modified SAP program, you may be able to
     find an interim solution in an SAP Note.
     If you have access to SAP Notes, carry out a search with the following
     keywords:

     "OBJECTS_OBJREF_NOT_ASSIGNED" "CX_SY_REF_IS_INITIAL"
     "ZMMM0065" or "ZMMM0065_F01"
     "TRANSFER_DATA"

     If you cannot solve the problem yourself and want to send an error
     notification to SAP, include the following information:

     1. The description of the current problem (short dump)

        To save the description, choose "System->List->Save->Local File
     (Unconverted)".

     2. Corresponding system log

       Display the system log by calling transaction SM21.
       Restrict the time interval to 10 minutes before and five minutes
    after the short dump. Then choose "System->List->Save->Local File
    (Unconverted)".

    3. If the problem occurs in a problem of your own or a modified SAP
    program: The source code of the program
       In the editor, choose "Utilities->More
    Utilities->Upload/Download->Download".

    4. Details about the conditions under which the error occurred or which
    actions and input led to the error.

    The exception must either be prevented, caught within proedure
    "TRANSFER_DATA" "(FORM)", or its possible occurrence must be declared in the
    RAISING clause of the procedure.
    To prevent the exception, note the following:

보시고 답변좀 부탁드립니다..꾸버억~