Not sure whether the upgrade to GW8 installed the right dictionary files?
Tip from Bob Jonkman :
When you find the .DC files open them in a text editor. The version
number is the first line in the file.
If all you have is "#VERSION=650" (or no version line at all) you
won't be able to upgrade the databases, although the new v8.0 agents
should work just fine with 6.5 databases.
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.