The IOManager was only keeping a reference to the Config object given in its constructor. Unfortunately, this means that if the original Config object would go out of scope, the reference would become invalid. Moreover, all internal objects (BufferedIOHandler, Meteo1DInterpolator, etc) were keeping the same reference to this external Config object. However, IOHandler was keeping a copy of the object. This has now been changed: IOManager keeps a copy of the Config object given to its constructor, and all other objects keep a reference to this copy. Therefore, the original Config object can be destroyed without any problem and the internal copy is kept at only one place (within IOManager).

A division by zero (for min=max) has been found and fixed in PGMIO. Moreover, the min and max are written in the metadata (so that the file can be read again and properly rescaled).