OpenLink Software does not support mixed-version installations.
Mismatched client and server software may not hinder your ability to connect and query.
However, version incompatibility issues will arise over time.
In fact, if you mix
Be advised: Under rare circumstances, you may be forced to deploy a mixed installation. As stated previously, 3.x and 4.x components tend to generate problems. However, 4.x client components appear to work well with 5.x server components.