hi there
>
>i have houdini 6.1 apprentice installed at home on a windows xp machine.
>when i bring home houdini.hip files from uni which run redhat 9, i cannot
>open them and get an error message saying ‘fileName.hip is not a valid Win32
>application’.
>
>can you help?
>
>thanks
>paul

You got the message when you tried to open a HIP file, in Explorer, right? Try opening it from Houdini, that should work.

HIP(NC) files are platform independent. In the worst case, you might need to get the paths to external sources right.