Out of Memory Exception when calling BAPI through JCO

Hi,

When i try to execute a BAPI from PDK it works fine and displays the results in the table.But when the same BAPI is executed from EP6.0 and say if the table has no of rows greater than 6000 , it throws the following exception...

java.lang.OutOfMemoryError: out of memory at com.sap.mw.jco.rfc.MiddlewareRFC$Client.nativeExecute

Can anyone help me with this?

Thanks,

Vivek