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I have some projects in Netbeans, that reside on mounted Filesystems (only accessible, when I'm at my clients office). Whenever I open Netbeans at home, and these Filesystem are not mounted, and I forgot to close the projects before, Netbeans creates new directories at the filepath of these projects. This prevents the filesystem from being mounted in the same path, unless I delete all these directories by hand. This is pretty tiresome...
If the path to a previously open project is nonexistent when NB starts up, it simply assumes the project was deleted and skips it; NB does not ask to recreate such a directory. Perhaps your operating system does something special with mount paths.
When Netbeans tries to open the Project, I get following Netbeans-Error: The Source folder /path/to/project cannot be restored. Please fix this problem and reopen the project. Then the path gets created. It's nice that it works for you on your OS, but that this happens on OSX is a valid bug IMO, and it shouldn't be closed just like that.
The critical piece of information you failed to mention is that you are using a PHP project; had to grep all NB sources to find such an error message.
Sorry, I didn't know that it makes a difference in Netbeans. If you need more information, I can replicate this bug as often as I want...
How is the project set up? Do you put the metadata in different place or are keep with the sources together?
I keep all my project files in a separate folder, so I can find them better.
Fixed in web-main. Should be ok from the continual build #2895 at http://bertram.netbeans.org/hudson/job/PHP-build/
Integrated into 'main-golden', will be available in build *201102230001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main/rev/3c67151f4f96 User: Petr Pisl <ppisl@netbeans.org> Log: #194800 - Netbeans creates new Directory for open Projects, if Filesystem is not mounted