undefined method 'extend_object' for 'Singleton'

[GoogleCodeExporter]

What steps will reproduce the problem?
1. On starting Sketchp I get message "Error Loading File sketchphysics.rb" 
followed by the undefined method...
2.
3.

What is the expected output? What do you see instead?
I exoted Sketchup to start up without this method.
Sketchyphyics doesn't work

What version of the product are you using? On what operating system?
Using V3.2
Win XP

Please provide any additional information below.

Original issue reported on code.google.com by curra...@bigpond.net.au on 10 Apr 2011 at 5:37

[GoogleCodeExporter]

I don't have same problem with V3.1

Original comment by curra...@bigpond.net.au on 10 Apr 2011 at 5:40

[GoogleCodeExporter]

I have the same problem. SP 3.2, SU8.

Original comment by pe...@peterolsen.com.au on 6 Jun 2011 at 12:20

[GoogleCodeExporter]

I get the same Error Loading File sketchyphysics.rb
undefined method `extend_object' for `Singleton' using SU8 SP 3.2

Original comment by willatfe...@gmail.com on 2 Nov 2011 at 11:59

[GoogleCodeExporter]

For me the deinstalling of the plugin "auto centerpoint" helped.

Original comment by carsten....@gmail.com on 6 Jan 2012 at 7:22