error: package folder already in use in another project

[tchite]

I'm trying to import a source folder into a new project in Netbeans but I keep getting the error "package folder already in use in another project".

The rub is that I have no projects AT ALL. I deleted them all. I did check the little box that asks if you want to delete source. I said yes.

But Netbeans didn't delete any project folders in the NetbeansProjects...so I deleted them manually.

The only thing I can think of next is to reinstall Netbeans 6.9.

Where does Netbeans keep track of packages in use?

[tchite]

If you see a project on the Internet, that you would like to put in Netbeans, you don't use the New Project functionality (under the file menu) of Netbeans which I was using.

Instead you copy the project folder to your computer, perhaps to the NetbeansProjects folder and then OPEN it (under the file menu).

It is a mystery to me what the FROM SOURCES selection does (File menu, New Project, Next, FROM SOURCES).