No Pathes with Spikes
It is checked for paths with spikes. A spike is a path segments in the opposite direction to the previous path segment. All paths on a entered layer will be checked. Next to the spikes check paths can optional be checked on sharp angles. A sharp angle is an angle bigger than 90° between to path segments. Sharp angles on paths are not clealy defined in the GDS spec and should be avoided. The spike check was introduced with version 20140409.