In Control Expert it is necessary to fill provided inputs and outputs for derived data types or I/O parameters (this is not necessary in Concept).
If these types are not generic, the converter will fill these initially empty inputs and outputs with variables created by the converter.
Open the Conversion Settings tab via Tools → Options in Control Expert to enable/disable the Variables at empty pins check box before converting.
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When this checkbox is enabled, empty link points will be filled with variables created by the converter.
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When this checkbox is not enabled, empty link points will not be filled with variables created by the converter.