Samuel's Tech Blog

(Starting to summarize how to solve those frustrating Eclipse problems, that come up over and over again ...)

If you get error messages like various ClassNotFoundException or:
"The activator net.bioclipse.ui.Activator for bundle net.bioclipse.ui is invalid"

... then, Click the little validator icon in the product file (right left to the question mark icon). Add the mission plugins/features in the corresponding tabs (plugins/features) in the product file editor (the tabs are at the bottom of the editor).

So, the things you have to know how to do, sometimes over and over again:

• Clean all projects (Menu: Project > Clean...)
• Refresh the workspace (select all projects, press F5 or select "Refresh" from context menu)
• Set target platform again (using the two above mentioned methods)
• Add required plugins in Run configuration
• Update classpath (Right click a plugin-project and go "PDE Tools > Update Class path").
  • (A little red exclamation mark on a project, typically means it is some problem with the build path)

Also, when importing jar files into the build path of a plug-in, you have to include the jar file itself, it does not work with just the folder that contains it.