I am not able to create Roll up tables. Can anyone help me in it?

Would you be so kind to update your signature so we know your version and platform....

If you mean by "Roll up" the functionality you can use at FML than this might help.

I copied this from one of the course masters

$--------------------------------------------------------------------
$ Copyright (c) 2002 Information Builders, Inc.  All rights reserved.
$
$ _Name_        ===> CENTGL   MASTER      _Opsys_    ===> CMS
$ _Release_     ===> 72                   _Product_  ===> FOC
$ _Description_ ===>
$               ===>
$ _Notes_       ===>
$
$ _History_:
$  Date  Time Who Proj      Project Title
$ ====== ==== === ===== ==============================================
$ 030113 1230 TJD 50144 52 Demos: Latest return required for CENTGL and LDSTMT
$ 021218 1504 TJD 49664 NCC DEMO: ADDED NEW FILES TO LOAD PROCEDURE
$
$ END %&$
$---------------------------------------------------------------------
FILE=CENTGL       ,SUFFIX=FOC
SEGNAME=ACCOUNTS   ,SEGTYPE=S01
FIELDNAME=GL_ACCOUNT,           ALIAS=GLACCT,  FORMAT=A7,
            TITLE='Ledger,Account', FIELDTYPE=I, $
FIELDNAME=GL_ACCOUNT_PARENT,    ALIAS=GLPAR,   FORMAT=A7,
            TITLE=Parent,
            PROPERTY=PARENT_OF, REFERENCE=GL_ACCOUNT, $
FIELDNAME=GL_ACCOUNT_TYPE,      ALIAS=GLTYPE,  FORMAT=A1,
            TITLE=Type,$
FIELDNAME=GL_ROLLUP_OP,         ALIAS=GLROLL,  FORMAT=A1,
            TITLE=Op, $
FIELDNAME=GL_ACCOUNT_LEVEL,     ALIAS=GLLEVEL, FORMAT=I3,
            TITLE=Lev, $
FIELDNAME=GL_ACCOUNT_CAPTION,   ALIAS=GLCAP,   FORMAT=A30,
            TITLE=Caption,
            PROPERTY=CAPTION, REFERENCE=GL_ACCOUNT, $
FIELDNAME=SYS_ACCOUNT,          ALIAS=ALINE,   FORMAT=A6,
            TITLE='System,Account,Line', MISSING=ON, $

So see if you can create a master on your GL database like this. It's the first step.