[ros-users] Problem with pluginlib

[Zhiping]

Hi to all,

I am currently practicing the plugin tutorial using this link 
http://www.ros.org/wiki/pluginlib/Tutorials/Writing%20and%20Using%20a%20Simple%20Plugin
http://www.ros.org/wiki/pluginlib/Tutorials/Writing%20and%20Using%20a%20Simple%20Plugin  

During the compilation, i received this error message:
[ERROR] [1297152667.981448465]: The plugin failed to load for some reason.
Error: According to the loaded plugin descriptions the class
pluginlib_tutorials/regular_triangle with base class type
polygon_base::RegularPolygon does not exist. Declared types are 

The error message also seemed to stop halfway. What may have gone wrong?

With thanks,
Zhiping

Attachment:
http://ros-users.122217.n3.nabble.com/file/n2449897/pluginlib_tutorials.zip
pluginlib_tutorials.zip 
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