This is one of several issues that I ended up helping a friend with last night on his Ubuntu installation. When clicking an item in the ‘Places’ menu, such as Pictures, Home, Music, etc, a dialog box appears that reads “Error: File not found”. We were scratching our heads until I realized that the error dialog looked suspiciously like it was being displayed using Wine.
After a bit of searching my suspicions were confirmed. This happens when, through one action or another, Wine is assigned the ‘Open Folder’ association. When you try to open a folder using the menu, Wine tries to open it and subsequently fails, and that’s where the error comes from.
Unfortunately I don’t have a screenshot but I do have a solution courtesy of Ubuntu Forums.
Open and edit the ~/.local/share/applications/mimeapps.list file. You can use this command:
gedit ~/.local/share/applications/mimeapps.list
Locate the line that starts with inode/directory= and change it to read as follows:
inode/directory=nautilus-folder-handler.desktop;
Save. Changes take effect immediately.
MikeBeach.org 