Deleting ".jdb" project files from your ADF project structure

When you are having referencing issues in JDeveloper which are not real since the references can be resolved. Try nuking the IDEs database files...after closing JDeveloper...then start it up again and the referencing issue will be something of the past. Unless, it was a real compilation issue, things will return back tot normal.

Here's the command you can use: del /S /Q *.jdb