How to run Batch Rename Datablocks Addon? If the button [ Run Script ] does nothing and Alt+P does nothing and right click Run Script does nothing. I don't even get an error message. Do I have to enable something? 

This is my first ever attempt at running a python script:

https://svn.blender.org/svnroot/bf-extensions/contrib/py/scripts/addons/object_batch_rename_datablocks.py

Wiki link: Batch Rename Datablocks
In the 3D view, type space then type "batch rename..." :



"Run script" just allows this to be available.

Since this is an Addon (not a regular script) you can make it (the operator and its functionality) permanently available, see: How to install an Addon?