...
- Close Eclipse.
- Navigate to the checked-out folder (usually the name of the branch) and open the .project file in a text editor. Note that the file may be hidden on your system.
- Change
Code Block
...
<natures></natures>
...
toCode Block
...
<natures><nature>org.eclipse.jdt.core.javanature</nature></natures>
...
- Save and close the .project file
- Re-open Eclipse.