Autodesk Inventor supports import of IGES format (.igs, .iges) just fine and can use the data to create a new Inventor project and save it as .idw drawing file. Without Inventor the actual conversion may be little tricky, as not many programs support Inventor formats. You may have luck with some dedicated CAD/3D modeling converters for iges to idw conversion as well.
Updated: April 28, 2020
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