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Presently, the DP-Toolbox uses as communication subsystem the external PVM system via the DPLOW-Toolbox. In the DP Model the communication subsystem is treated as a resource, that has to be present and already configured.
A connection to the PVM subsystem is established by calling a DP command the first time. After that, your DP instance becomes a PVM task. To disconnect from the subsystem, call dpexit.