Need to Pick the file with continious records in File Sender

Hi,

I am Working with File to Idoc Scenario. Where I am using Field Fixed length as FCC. The fixed length of each record is 200.

I am able to pick the first 200 characters.

For example:

If the file has 600 characters continiously. The first 200 belong to first record and second from 201 to 400 and so on.

How can i control this in File adapter.

Regards,

Manoj