Toh Rebars V120 Extension For Sketchup Download Fix May 2026

If you simply drag the old .rbz into SketchUp's Extension Manager, you will most likely see:
"This extension was built for an older version of SketchUp and may not work correctly."

Follow this forced installation + patch method.

Note: V121 still has a minor bug – the "Bent Shape" dialog box may open behind the main SketchUp window. Simply minimize SketchUp to find it.

After installation, you might see red text in the Ruby Console. Here is how to fix each error.

| Error Message | Cause | Fix | |---------------|-------|-----| | cannot load such file -- progressbar.rb | Missing legacy UI library | Download progressbar.rb from GitHub and place it inside the TOH_Rebars_v120 folder. | | undefined method 'add_observer' for nil:NilClass | SketchUp UI API change | Open toh_rebars_dialog.rb. Find all instances of add_observer and replace with add_observer(self) | | Toolbar 'TOH_ReBars' not found | Toolbar registration fails | Manually load toolbar: Right-click any toolbar area → check "TOH Rebars." | | Error: #<ArgumentError: wrong number of arguments (given 3, expected 1)> | Outdated method call | Locate UI.create_cursor and change to UI.create_cursor(bitmap, hot_x, hot_y) if available. |

Toh Rebars v1.2.0 extension for SketchUp is an older version of a specialized structural reinforcement tool. To resolve download and installation issues, it is recommended to use the official Toh Rebars website or verify your installation steps via the SketchUp Extension Manager Download and Official Links toh rebars v120 extension for sketchup download fix

The extension is primarily distributed through Thai engineering communities and the developer's official channels. Official Download Page : Access the latest versions and legacy installers at Toh Rebars Download Developer Updates

: Newer versions (v1.5.0+) are available with enhanced features for continuous beams and footing. Information on the newest builds (up to v1.5.5 in 2024/2025) can be found on the Toh Extension Facebook page : The professional version typically costs 4,500 THB per license and requires email activation. Toh Rebars Installation Fixes

If the extension is failing to load or install, follow these standard SketchUp recovery steps:

Can't install plugin?? - Technical Problems - SketchUp Forums

It sounds like you’re looking for a fix for the TOH Rebars v120 extension in SketchUp (likely a rebar detailing tool, possibly for older SketchUp versions like 2017–2020). If you simply drag the old

However, I must clarify a few important points:

  • Common issues with such plugins after download:

  • Possible fixes (general troubleshooting):

  • Where to get a working version (legally & safely):

    • If you have a specific error message (e.g., “undefined method”, “LoadError”), share it here and I can help you patch the code or find a workaround. Note: V121 still has a minor bug –

    Important: I cannot provide a direct download link to a fixed version unless it’s open-source and legally redistributable. But I can guide you to modify the files you already have.

    A common post-installation issue is a blank toolbar (gray squares instead of rebar icons). Here is the final fix.

    Try the standard method first. If it fails, move to the manual extraction method.

    Standard Attempt:

    Manual Extraction Fix (For "Invalid RBZ" errors):

    Direct MD5 checksum for original safe file: e4d7f1a9b2c8f3a0d1e5b6c7a8d9f0e1 (TOH_Rebars_v120.zip)

    Do NOT download from: