Can't add objects to Blender Library Script

I installed the python script - Blender Library 1.3.4

I really want to get this script to save me a lot of hassle. I can load the script just fine. I set up the location of the library directory and indeed it there. But when I select an object to add, it gives the error:

python script error: check console

I am using Ubuntu Linux, and the command prompt reports this error:

Traceback (most recent call last):
File “<string>”, line 788, in button_event
File “<string>”, line 2278, in save_object
RuntimeError: could not find object’s selection state

The object is selected and I have the correct name for the object. What could be causing this error and how do I fix it?