@tig said:

If you look at the posts a few earlier you'll see that it's not compiled for the newer SketchUp version...
Hence the error messages ?

oh, i am sorry! thanks for your reply.

it's not working for SketchUp 2019

Error when loading file C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/main_entry.rb Error: #<IOError: The required, staged c extension file, "C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/libraries/stage/win64/2.5/msp_lib.so", is missing!> C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/ams_Lib/extension_manager.rb:204:inblock in require_all'
C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/ams_Lib/extension_manager.rb:201:in each' C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/ams_Lib/extension_manager.rb:201:in require_all'
C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/main.rb:70:in <top (required)>' C:/Program Files/SketchUp/SketchUp 2019/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:59:in require'
C:/Program Files/SketchUp/SketchUp 2019/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:59:in require' C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/main_entry.rb:15:in <top (required)>'
C:/Program Files/SketchUp/SketchUp 2019/Tools/extensions.rb:197:in require' C:/Program Files/SketchUp/SketchUp 2019/Tools/extensions.rb:197:in load'
C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics.rb:21:in register_extension' C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics.rb:21:in module:MSPhysics'
C:/Users/Username/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics.rb:5:in <top (required)>'