Neil and Jaime, Many thanks indeed for your replies. Some info follows, Denis

>Is the low memory being reported on the server console or the workstation, >also are there any other errors being reported on the server console.

On the workstation - there are no errors on server console.

>What version of Novell server?

NOVELL NETWARE VERSION 5.2

>What do you have, in the Novell Client properties - Advanced Settings tab, for File Caching and >File Commit ?

The client has :
FILE CACHING = On
FILE COMMIT = On