# Eclipse RDT preferences page not error

**URL:** <https://www.ruby-forum.com/t/eclipse-rdt-preferences-page-not-error/69331>\
**Category:** Ruby\
**Created:** [February 16, 2006, 6:50pm UTC](https://www.ruby-forum.com/t/eclipse-rdt-preferences-page-not-error/69331 "2006-02-16T18:50:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [February 16, 2006, 6:50pm UTC](https://www.ruby-forum.com/t/eclipse-rdt-preferences-page-not-error/69331/1 "2006-02-16T18:50:44Z")

</div>

hi,

When I try to install the Ruby RDT (v7) for Eclipse 3.1.1 by  
downloading the file and upzipping it into the Eclipse directory, the  
plugin installs in that I can see it listed as a plugin, but the  
Preferences page for it produces an error:

Unable to create the selected Preference Page

Reason:  
Plug-in org.rubypeople.rdt.ui was unable to load class  
org.rubypeople.rdt.internal.ui.preferences.RubyBasePreferencePage

I can see that this file is in a zip file, but Eclipse can’t see it.

Any ideas?

TIA