Try substituting all backslashes with forward slashes, i.e., file://///PC-Name/C/FolderName/data.db
If that doesn't work, maybe there is something going on with URI support in the 64bit build you're using. Takashi Fukuda wrote: > > For x64 target compilation with System.Data.SQLite-x64-1.0.97.dll (.NET4) > > Error message: "unable to open database file" > > This problem happens when our applications access to the SQLite data file > "data.db" via LAN, with "<file:///\\PC-Name\C\FolderName\data.db> > \\\\PC-Name\\C\\FolderName\\data.db" format. The local access with > "C:\\FolderName\\data.db" works fine. As described above, the x32 version > works fine both local and LAN access.