If enabled, it will try to predict the path for a file.

Example:
Your loading a model.
First you load the example.mdl file.
Then you load the example.phy file.
Here we can check if the example.mdl file is in the searchcache.
If so, we try to use the searchpath of that file for the .phy file and since all model files should be in the same folder, this will work for most cases.
If we fail to predict a path, it will end up using one additional search path.