D5 LiveSync for SketchUp failed to load – ArgumentError: string contains null byte

Hi everyone,

I’m having a very strange issue with the D5 LiveSync plugin for SketchUp and I can’t get it to work anymore.

The problem started after SketchUp and D5 Render both crashed unexpectedly. Since then, the D5 plugin no longer loads.

When SketchUp starts, I get this error:

** C:/Users/Alexis/AppData/Roaming/SketchUp/SketchUp 2025/SketchUp/Plugins/d5_converter/ruby32/SUEX_D5Converter.so: warning: undefining the allocator of T_DATA class swig_runtime_data Loading SUEX_D5Converter…: C:/Users/Alexis/AppData/Roaming/SketchUp/SketchUp 2025/SketchUp/Plugins/d5_converter/ruby32/SUEX_D5Converter.so #<ArgumentError: string contains null byte> c:/users/alexis/appdata/roaming/sketchup/sketchup 2025/sketchup/plugins/d5_converter/su_to_d5render.rbe:2148:in init_data_tracking'c:/users/alexis/appdata/roaming/sketchup/sketchup 2025/sketchup/plugins/d5_converter/su_to_d5render.rbe:2148:in init'c:/users/alexis/appdata/roaming/sketchup/sketchup 2025/sketchup/plugins/d5_converter/su_to_d5render.rbe:2198:in <module:D5Main>'c:/users/alexis/appdata/roaming/sketchup/sketchup 2025/sketchup/plugins/d5_converter/su_to_d5render.rbe:2053:in <main>'C:/Program Files/SketchUp/SketchUp 2025/SketchUp/Tools/extensions.rb:197:in eval'C:/Program Files/SketchUp/SketchUp 2025/SketchUp/Tools/extensions.rb:197:in require'C:/Program Files/SketchUp/SketchUp 2025/SketchUp/Tools/extensions.rb:197:in load'C:/Users/Alexis/AppData/Roaming/SketchUp/SketchUp 2025/SketchUp/Plugins/d5_converter.rb:58:in register_extension'C:/Users/Alexis/AppData/Roaming/SketchUp/SketchUp 2025/SketchUp/Plugins/d5_converter.rb:58:in <module:D5Converter>'C:/Users/Alexis/AppData/Roaming/SketchUp/SketchUp 2025/SketchUp/Plugins/d5_converter.rb:29:in <top (required)>'**

What I’ve already tried:

  • Completely uninstalled and reinstalled the D5 LiveSync plugin multiple times.
  • Completely reinstalled D5 Render.
  • Completely reinstalled SketchUp.
  • Tested multiple SketchUp versions (including older and newer versions).
  • Deleted the d5_converter plugin folder and installed it again.
  • Deleted or renamed multiple D5 folders under AppData (Roaming and Local), including D5 , D5Config , D5Launcher , and other configuration folders.
  • Restarted the PC several times.
  • The problem persists exactly the same.

At this point, I think a configuration or tracking file may have become corrupted after the crash, because the error always occurs inside init_data_tracking .

Has anyone experienced this issue before or knows which file or folder init_data_tracking reads so I can delete or reset it?

I’ll attach screenshots of the error and my folder structure below.

Any help would be greatly appreciated. Thank you!

Are both su2022 and su2025 showing abnormal error messages?
Is the currently used plugin version 1.6.1.0020?