@dave r said:

The error messages indicate you've not installed TT_Lib2 correctly. How about showing us a screenshot of your Plugins folder.

This plugin and TT_Lib2 work just fin with SU8 and SU2013 when installed correctly.

on closer inspection, I see that the error messages all seem to relate to
C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/libraries/win32/TT_Geom_BezierError

well, yes indeedy that file is not there

a disk-wide scan for TT_Geom_Bezier finds TT_Geom_Bezier.bundle in the osx folder...

Is there an easy/correct way to force a re-install of TT_lib2?

Directory of c:\Program Files\Google\Google SketchUp 8\Plugins\TT_Lib2\librarie
s\win32

09/12/2013 05:47 PM <DIR> .
09/12/2013 05:47 PM <DIR> ..
01/16/2011 04:31 PM 446 tt_api-readme.txt
01/15/2011 03:26 PM 28,672 tt_api.so
2 File(s) 29,118 bytes
2 Dir(s) 380,049,514,496 bytes free

Directory of c:\Program Files\Google\Google SketchUp 8\Plugins

09/12/2013 05:43 PM <DIR> .
09/12/2013 05:43 PM <DIR> ..
06/28/2013 01:23 PM 3,474 !SketchUcation_loader.rb
01/18/2013 11:30 AM <DIR> cutlist
08/04/2010 01:37 AM 1,535 cutlist.rb
01/09/2012 07:05 PM 1,251 engineeringtoolbox.rb
09/11/2012 04:11 PM <DIR> Examples
08/23/2012 04:02 AM 2,412 examples.rb
06/05/2013 05:42 PM <DIR> HibouScientificSoftwareLibrary
06/05/2013 05:42 PM <DIR> Khamsin
05/31/2013 11:08 AM 1,755 khamsin.rb
02/07/2012 03:34 PM <DIR> ldd
01/25/2012 07:41 PM 11,274 ldd.rbs
09/11/2012 04:11 PM <DIR> Ocean
08/23/2012 04:02 AM 1,065 ocean_extension.rb
09/12/2013 03:34 PM <DIR> SketchUcation
04/01/2013 06:50 PM 17,857 TIG-solidsolver.rb
01/19/2012 04:36 PM 2,983 tt_export.rb
09/12/2013 05:47 PM <DIR> TT_Lib2
04/19/2013 01:31 PM 1,876 TT_Lib2.rb
09/12/2013 03:36 PM <DIR> tt_solid_inspector
04/25/2013 02:00 PM 1,614 tt_solid_inspector.rb
09/11/2012 04:11 PM <DIR> Utilities
08/23/2012 04:02 AM 1,175 utilities.rb
01/30/2012 12:16 PM 19,578 VolumeCalculator21.rb
13 File(s) 67,849 bytes
12 Dir(s) 380,050,038,784 bytes free

Directory of c:\Program Files\Google\Google SketchUp 8\Plugins\TT_Lib2

09/12/2013 05:47 PM <DIR> .
09/12/2013 05:47 PM <DIR> ..
01/18/2013 12:29 PM 2,231 arc.rb
02/19/2013 08:00 PM 1,844 attributes.rb
02/19/2013 07:59 PM 8,916 babelfish.rb
04/01/2013 07:46 PM 493 bezier.rb
01/18/2013 12:29 PM 660 binary.rb
01/18/2013 03:28 PM 1,233 boolean_attributes.rb
02/19/2013 07:59 PM 4,304 bounds.rb
01/23/2011 11:31 PM 2,803 CHANGELOG.txt
01/18/2013 12:29 PM 626 color.rb
04/19/2013 12:40 PM 12,092 core.rb
01/18/2013 12:29 PM 8,084 cursor.rb
09/12/2013 05:47 PM <DIR> cursors
01/18/2013 12:29 PM 1,667 debug.rb
01/18/2013 12:29 PM 1,128 deferred_event.rb
01/18/2013 12:29 PM 3,535 definition.rb
01/18/2013 12:29 PM 6,796 dimension.rb
04/03/2013 11:00 AM 2,784 draw_cache.rb
03/25/2013 01:50 PM 16,240 edges.rb
03/25/2013 01:50 PM 4,266 entities.rb
06/05/2013 03:29 PM 88 extension_info.txt
03/25/2013 01:51 PM 3,652 faces.rb
03/25/2013 01:51 PM 6,177 geom3d.rb
03/25/2013 01:30 PM 48,638 gizmo_manipulator.rb
03/25/2013 01:52 PM 18,667 gl_image.rb
03/25/2013 01:32 PM 20,205 gui.rb
03/25/2013 01:33 PM 685 image.rb
03/25/2013 01:56 PM 11,211 inputbox.rb
04/01/2013 08:10 PM 1,936 instance.rb
04/03/2013 10:32 AM 658 integrity_list.dat
03/25/2013 01:35 PM 1,264 javascript.rb
03/25/2013 01:53 PM 2,930 json.rb
01/18/2013 12:29 PM 693 length.rb
09/12/2013 05:47 PM <DIR> libraries
01/18/2013 12:29 PM 3,552 locale.rb
03/25/2013 01:36 PM 6,665 materials.rb
01/18/2013 12:29 PM 1,552 metaclass.rb
03/02/2013 05:17 PM 2,888 modal_wrapper.rb
03/25/2013 01:38 PM 3,980 model.rb
03/25/2013 01:38 PM 3,947 point3d.rb
03/25/2013 01:39 PM 1,758 point3d_ex.rb
02/19/2013 07:57 PM 9,595 profiler.rb
03/25/2013 01:40 PM 4,350 progressbar.rb
03/25/2013 01:40 PM 5,350 ray.rb
08/29/2010 02:43 AM 235 README.txt
03/25/2013 01:40 PM 629 selection.rb
01/18/2013 12:29 PM 2,830 settings.rb
03/25/2013 01:41 PM 2,195 simpletask.rb
03/25/2013 01:42 PM 2,528 sketchup.rb
01/18/2013 12:29 PM 923 system.rb
03/25/2013 01:46 PM 819 toolbarwindow.rb
03/25/2013 01:45 PM 741 toolwindow.rb
01/18/2013 12:29 PM 704 uvq.rb
02/19/2013 07:58 PM 7,201 uv_plane.rb
01/18/2013 12:29 PM 3,782 version.rb
10/11/2011 12:59 PM <DIR> webdialog
01/18/2013 12:29 PM 3,644 webdialog_patch.rb
04/01/2013 07:46 PM 11,220 win32.rb
03/25/2013 01:48 PM 17,093 window.rb
55 File(s) 294,687 bytes
5 Dir(s) 380,050,038,784 bytes free

I am having trouble getting solid inspector going.
I noticed the message about needing TTlib2, and manually installed TTlib2.8.3
When Sketchup 8 starts, I get the following massages:

Error Loading File C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/bezier.rb
no such file to load -- C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/libraries/win32/TT_Geom_BezierError Loading File C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/gl_image.rb
no such file to load -- C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/libraries/win32/TT_Geom_BezierError Loading File tt_export.rb
no such file to load -- C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/libraries/win32/TT_Geom_BezierError Loading File C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/bezier.rb
no such file to load -- C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/libraries/win32/TT_Geom_BezierError Loading File C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/gl_image.rb
no such file to load -- C:/Program Files/Google/Google SketchUp 8/Plugins/TT_Lib2/libraries/win32/TT_Geom_Bezier

There is also a LL_Lib2 not installed doo-dad offering to download TTlib2
version 2.8.0. WHen I let it do its thing, and install that version,
same thing.

In some brief poking around, I noticed something about core.rb
and when I open it it says it is compatible with sketchup 7 and untested
with other versions...

What is the scoop? Is SK8 OK? how about SK2013?
How is it that the uninstalled_downloader for 2.8.3 refers to 2.8.0?
What is the "most current" working version?
and like that...

THx