# Error after upgrading to RubyDevTools 0.6.0

**URL:** <https://www.ruby-forum.com/t/error-after-upgrading-to-rubydevtools-0-6-0/49190>\
**Category:** Ruby\
**Created:** [December 1, 2005, 2:29am UTC](https://www.ruby-forum.com/t/error-after-upgrading-to-rubydevtools-0-6-0/49190 "2005-12-01T02:29:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jeff.fry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/977dab/32.png) [@jeff.fry](https://www.ruby-forum.com/u/jeff.fry)\
**Post date:** [December 1, 2005, 2:29am UTC](https://www.ruby-forum.com/t/error-after-upgrading-to-rubydevtools-0-6-0/49190/1 "2005-12-01T02:29:52Z")

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Hi,

I’m getting the following errors:

Trying to create a new rb project:  
Plug-in org.rubypeople.rdt.ui was unable to load class  
org.rubypeople.rdt.internal.ui.wizards.NewProjectCreationWizard.

Trying to open a rb file:  
Plug-in org.rubypeople.rdt.ui was unable to load class  
org.rubypeople.rdt.internal.ui.rubyeditor.RubyEditor.

Things I’ve tried thus far:

- had been using Eclipse 3.0.1 & RDT 0.5.0 - no problems
- upgraded to RDT 0.6.0 & restarted Eclipse - got the error above
- upgraded to Eclipse 3.0.2 & restarted - no change
- rebooted machine (OS = WinXP) - no change

Any suggestions would be appreciated!

Thanks,  
Jeff