Hi Javier, | Hugs 98 User Manual of September 1999, says that the facility of = Multiple | parameter type classes already is available in Hugs 98. |=20 | Then, how can I use this? =20 Use the -98 command line option when you start Hugs. If you need more detail, this is described at the beginning of Chapter 7 in the user manual that you mention. Hope that helps, Mark