I have an NT4 server with service pack 4 (and 5 - problem is with both),
running SQL 6.5, service pack 5a. I am trying to upgrade to SQL 7, service
pack 1. The problem is that I cannot run SQL 6.5 after switching back to
it. That means I cannot upgrade user databases, of course, without
upgrading between 2 servers. The error in the Event Viewer of NT says there
is an invalid null within the master.dat, and SQL produces the error that I
cannot connect because the SQL server does not exist.
Has anybody come across this before? And, if so, is there a workaround?
Many thanks in advance,