RFC parameters

Hello,

In my scenario I'm extracting some tables and for this purpose I created FM which I use to send these data to SAP XI. I would like to used parameter row, which is a table that contains table of fields... So I have table in table and quite a problem how to model that FM, becase I get this error: com.sap.mw.jco.JCO$Exception: (106) JCO_ERROR_RESO

When I don't send this row parameter to SAP XI everythink works fine...

Milan