Is there any known problem to use Progress Client 9 with Database running V.
I was under the impression that it can not be done and the client version has to be the same as the db version?
Progress always has the possibility to connect higher version clients to lower version databases (in client/server (networking) mode only). The rule is that a version X client can connect to a version X - 1 database server. So in your case, yes a V9 client can connect to a V8 database (server). Hope this helps.