Among the many, many problems with m4l docs, there is this;
The autopattr object does not work with Max for Live's parameter system
3. Add an autopattr object to your device
Another big, big problem is that descriptions of pattrstorage parameter mode lead one to believe that presets are stored in the set _file_, whereas they are actually stored in a separate file in the _set folder_. This is a major source of concern for file management and performance.
M4L is a wonderful program. Shouldn't it be wonderfully documented?