Non default Editor for XML files line .p2f, .project, .classpath, .launch and of course .xml.
Reason: Eclipse standard XML Editor is sometimes picky about whether open XML file.
Open an issue if you know other solution.
- Import
org.nodeclipse.enide.editors.notxmlas existing Eclipse project in Eclipse with PDE (e.g. Eclipse Standard) - open
plugins.xml - click
Launch an Eclipse application in Debug mode