Description:
The System Requirements section of the TIBCO iProcess™ Workspace Plug-ins Installation Guide, Software Release 10.6, May 2007, states the following:

TIBCO iProcess Workspace (Windows)
       TIBCO iProcess Workspace (Windows) Version 10.6 (which
        includes the TIBCO iProcess Modeler).

This should also include the following which has been validated by TIBCO Quality Assurance:
       TIBCO iProcess Client (Windows) Version 10.5.1 and
       TIBCO iProcess Modeler Version 10.5.1.

This would mean the following, as an example, would be a supported combination of products:
- TIBCO iProcess Engine Version 10.5.1
- TIBCO iProcess Client (Windows) Version 10.5.1 and
   TIBCO iProcess Modeler version 10.5.1
- TIBCO iProcess Workspace Plug-ins Version 10.6.0
- TIBCO iProcess Technology Plug-ins Version 10.7.0