OpenLink 3.x & 4.x: Do They Work Together?

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 OpenLink 3.x and OpenLink 4.x software, expect specific problems with stability, transactions, and threading. These problems may only be resolved by upgrading the older component.