Try:

1. Start Rhino in SafeMode.
2. On the Rhino Tools menu, click Options > Plug-ins.
3. Clear the Enabled check box for all of the plug-ins that did not ship with Rhino.
4. At the bottom of the dialog box, check the Ask to load disabled plug-ins box.
5. Restart Rhino without using SafeMode.
6. Answer No to loading all of the plug-ins you disabled.

The problem is one of the disabled plug-ins.

Try:

1. Restart Rhino as normal.
2. Answer Yes to loading one plug-in at a time and No to the rest until you determine which one causes the problem.
3. When you have determined which plug-in causes a problem, on the Tools menu, click Options > Plug-ins.
4. Check the Enabled box for all of the plug-ins that do not cause a problem.

Is the problem solved?

• Yes. Yay!
  
• No. Copy and paste the following text into a email to tech@mcneel.com:

Note: This wiki page is part of a troubleshooting wizard. Start from the beginning.