Creating BAPI - "Generic types are not allowed in parameter types"

Dear Experts,

Greetings.

I am trying to create a BAPI (RFC enabled function module) in which i have around 5 - 6 import parameters. If I define them as type C or type table-dataElement, it says Generic types are not allowed.

I do not have any sutable structures for the variables...any suggestions?

thanks and regards

Sathya