Yes maya....You need to do the following:
1. Keep your seq file (Make your excel sheet as .csv File and have some marker as delimiter) in any directory where by you can access through program.
2. Write a program to generate the OFS messages.(Hope you are familiar with version you are going to input etc.). In your case you must have multiple records in your IN.DIR. For each record there should be only one message that you are going to input.
Example:
1 <ID OF THE FILE>
CUSTOMER, ...................<YOUR MESSAGE>
2<ID OF THE FILE>
CUSTOMER, ...................<YOUR MESSAGE>
The id of the file you must generate from your program.
Note: If you are trying to input a new deal in CUSTOMER then id part of OFS message can be left blank so that auto id can be generated by the system. Or if you are going to update some fields in the CUSTOMER profile then ID part of the OFS message is mandatory.
After verifying the
TEST.IN will be cleared and TEST.OUT will be with your OFS results.
Still if you have any doubts let me know.