How to handle large volume in lsmw

Hi,

I have a problem to handle large volume files in lsmw.

I have 4 or 5 file larger than 300 MB.

The LSMW can not handle this kind of files.

To split the files is very difficult and time consuming.

is there another way to read small parts in LSMW.

Maybe read only a certain amount of records.

Thank you very much in advance.

Rg. Jimbob