Upgrading from version 5.x to v 5.32 and later of OPC Data Client

When installing version 5.32 or later, it is strongly recommended that you first uninstall any version numbered between 5.00 and 5.31, instead of simply applying the installation over the previous version.

The reason for this that the earlier versions installed the runtime assemblies into the Global Assembly Cache (GAC), whereas versions 5.32 and later do not do this by default.

Having older assemblies in the GAC while developing with newer assemblies outside of the GAC is possible in principle, but without extra precautions, it can lead to all kinds of mix-ups and confusion.

Upgrading from version 5.x to v 5.32 and later of OPC Data Client

Version 5.32 of the OPC Data Client included a number of improvements that are significant and require additional attention. This FAQ addresses those requirements.