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# 3. Prerequisites

The Vortex OpenSplice environment must be set correctly for UNIX-based platforms before the Vortex OpenSplice IDL Pre-processor can be used.

Run `release.com` from a shell command line to set the environment.

`release.com` is located in the root directory of the Vortex OpenSplice installation (`<OSPL_HOME>`):

    % . <OSPL_HOME>/release.com

The Vortex OpenSplice IDL Pre-processor, `idlpp`, can be invoked by running it from a command shell:

    % idlpp

The `idlpp` command line options are fully described in IDL Pre-processor Command Line Options.

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