Flash Builder Help / Unable to create a project in Flash Builder's default workspace | Flash Builde

轉載自：http://helpx.adobe.com/flash-builder/kb/unable-create-project-flash-builders.html

Issue

You can encounter this error when you try to create a project in Flash Builder's default workspace: "org.eclipse.core.internal.preferences.EclipsePreferences cannot be cast to org.eclipse.core.internal.resources.ProjectPreferences"

This error occurs if you have installed Flash Builder in a path that has double-byte characters such as Japanese kanji or Chinese hanzi.

Solution

 Switch to a different workspace by following these steps:

In Flash Builder, select File > Switch Workspace > Other. 

Browse to or enter a new workspace location. You can also choose a previously selected workspace. 

Once you switch to a different workspace, you can switch back to Flash Builder's default workspace, if necessary.