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A signature of user code must follow strict rules to allow interaction between it and wrapping actor.  Please use following  >>link<< to get detailed guidelines for integration of native code into workflows using iWrap  

Native code description

iWrap, to generate an actor wrapping user code, need a formal code description that provide information about the programming language used, arguments passed to/from the code, type of these arguments, etc, etc... Such description has to be provided in YAML format file, prepared manually, or with help of iWrap GUI.

 YAML file syntax

sss

 iWrap GUI

wrapping (job description, iWrap)

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