RHI files are RHino Installer Packages.
They are designed to simplify installation of Rhino plug-ins.

Rhino or some other program starts when I double-click an RHI file

Cause: Windows doesn't have the file associations set correctly for RHI files.
Solution:

1. Download and run RhiFix.exe
2. If the fix does not work, please send the following to support@mcneel.com:

• A screenshot of the error
• Repair Utility log (all the text below RECOMMENDED ACTION)
• The RHI installer log. Here is where you find it in V5, V6 or V7:
  • Rhino 5: `%appdata%\mcneel\rhinoceros\5.0\logs`
  • Rhino 6: `%appdata%\mcneel\rhinoceros\6.0\logs`
  • Rhino 7: `%appdata%\mcneel\rhinoceros\7.0\logs`

Windows can't open this file

Cause: Windows doesn't have the file associations set correctly for RHI files.
Solution:

1. Download and run RhiFix.exe
2. If the fix does not work, please send the following to support@mcneel.com:

• A screenshot of the error
• Repair Utility log (all the text below RECOMMENDED ACTION)
• The RHI installer log. Here is where you find it in V5, V6 or V7:
  • Rhino 5: `%appdata%\mcneel\rhinoceros\5.0\logs`
  • Rhino 6: `%appdata%\mcneel\rhinoceros\6.0\logs`
  • Rhino 7: `%appdata%\mcneel\rhinoceros\7.0\logs`

Package not compatible

There are a few possible reasons this error can occur. The most likely are first:

1. Incorrect File Associations:
   • Download and run RhiFix.exe
   • If the fix does not work, please send the following to support@mcneel.com:
     • A screenshot of the error
     • Repair Utility log (all the text below RECOMMENDED ACTION)
     • The RHI installer log. Here is where you find it in V5, V6 or V7:
       • Rhino 5: `%appdata%\mcneel\rhinoceros\5.0\logs`
       • Rhino 6: `%appdata%\mcneel\rhinoceros\6.0\logs`
       • Rhino 7: `%appdata%\mcneel\rhinoceros\7.0\logs`

1. Old Rhino 5: attempting to install Grasshopper into Rhino V5 SR0 can generate this error. Update your Rhino 5 to the current service release to fix this problem.
2. Corrupt Download: a corrupt RHI file that cannot be installed. This often is the result of an incomplete download. Please delete the RHI file, clear your web browser's temporary files, and download again.
3. Poorly Authored RHI: if you are a developer, you may have not properly created the RHI file. Please review instructions for authoring RHI files.

Rhinoceros 5 file open error

Cause: Somehow, Rhino 5 was incorrectly associated with RHI files.
Solution:

1. Download and run RhiFix.exe
2. If the fix does not work, please send the following to support@mcneel.com:

• A screenshot of the error
• Repair Utility log (all the text below RECOMMENDED ACTION)
• The RHI installer log. Here is where you find it in V5, V6 or V7:
  • Rhino 5: `%appdata%\mcneel\rhinoceros\5.0\logs`
  • Rhino 6: `%appdata%\mcneel\rhinoceros\6.0\logs`
  • Rhino 7: `%appdata%\mcneel\rhinoceros\7.0\logs`

Deploying for all users on a computer

See Installing RHI Files for All Users for details.

See Uninstalling Rhino 5 RHI Plug-ins for step by step instructions on removing plug-ins installed by RHI.