Hi,

Level number 66 is only for renaming the variable.

66 ACCOUNT-NUM PIC X(09) RENAME ACCT-NUM.

Level number 88 is a Condition name variable.It's used for condition checking.

I declared one Condition name variable

01 EOF PIC x(1).
88 EOF-Y vALUE 'Y'.
88 EOF-N VALUE 'N'.


Below perform statement will stop when the EOF-Y is true.

PERFORM 300-PROCESS-PARA THRU 300-EXIT
UNTIL EOF-Y.

When the file is reaches the Enf of file condition then it move "Y" to EOF.Now EOF-Y is true.

200-READ-PARA.
READ CUST-INFILE AT END MOVE 'Y' to EOF.
200-EXIT-PARA.
exit.

I think it will help you.

Thank's
Loges