We have just migrated our 3 most important servers from Netware 5.1 SP8 to
Netware 6.5 SP4. When we were on Netware 5.1 we where using the DSCAT
contextless login, and have now migrated to using LDAP, however we are
finding that some clients are getting the "cannot find tree or server" error
message when trying to login. We have also found that if we then drop down
the "advanced" page of the client and enter the address of one of our
servers in the server box that the login then works correctly.

Just incase the following is relevant to the problem : the workstations are
configured via DHCP (from a Linux server), we have 2 of our Netware servers
setup as SLP servers and the addresses of these are pushed out via DHCP.