I am using the Geometry Coercer to convert a polygon feature to polyline (both ESRI Geodatabase Feature Classes). However, an error in the output dialog always states: Cannot write a non-linear feature to a polyline feature class Any help is appreciated.
One suggestion, check the parameters of the destination type via Feature Type Properties window, does changing the Allowed Geometries to "geodb_polygon" result in correct output or does it generate same error? The GeometryCoercer transformer can't be directly used to convert donut polygons to lines. If you need to do this, extract the donut parts first using the DonutHoleExtractor transformer.