I have found a bug with the Viewer Add GP Tool, thought I'd share my pain. I have a geoprocessing service that only requires an input polygon digitized by the user. In my model, the featureset is converted to a feature class with Copyfeatures tool, then the geometry is used to extract some raster data. The tool works fine when the polygon is digitized in a clockwise direction, but an invalid feature with negative area is produced, if digitized in a counter-clockwise direction in the Viewer. The check geometry tool confirms that the counter-clockwise feature has invalid ring ordering, so I'm using the Repair Geometry tool in my model as a work around.
