optiload question

Hi,

Is there anyone who has worked with "optiload" product?
I need help on handling varchar data in optiload.
Iam trying to load data from a file to the table. The file has varchar data from positions 100-200. the length of the file is 200. when the actual length of the data is say, 50 bytes, and the datatype in record definitioin is varchar(100), optiload is transferring 50 bytes of data tothe varchar field in table. then it uses data from 51st byte from the file as the data for the next row. but it should actually read the next record in the file. how can this be done?

Thanks