I would not conclude that migrating is necessarily "fraught" with problems.  I
strongly endorse James Shanks' correct way of doing things unless you have the
specific situation where the "fast migration" is applicable, that is, all you
want to preserver is your trapd.conf customizations and your current maps and
the new NetView 5.1.1 has all the applications that your old NetView 4.1 install
had.  In this specific case, the tar and untar of the /usr/OV/database directory
is simple, easy and 'bulletproof'.

Regards,
ken
kgarst AT giantofmaryland DOT com