Donald Griggs tried to help this problem, and we looked at the Jean C's advice. However the problem remains. The actual codes using are as follows:
=========================================================== string dataFile = "\\\\PC-Name\\C\\FolderName\\data.db <file:///\\PC-Name\C\FolderName\data.db> " ; // // For x32 target compilation with System.Data.SQLite-x32-1.0.97.dll (.NET4) // The application works fine. // // For x64 target compilation with System.Data.SQLite-x64-1.0.97.dll (.NET4) // Error message: "unable to open database file" using (SQLiteConnection cnn = new SQLiteConnection(dataFile)) using (SQLiteCommand cmd = cnn.CreateCommand() { cnn.Open(); <<<<< causing error ! =========================================================== Can anybody help ? Best regards, Takashi Fukuda takashifukuda at comcast.net From: Takashi Fukuda [mailto:takashifuk...@comcast.net] Sent: Thursday, June 18, 2015 11:35 AM To: 'sqlite-users at mailinglists.sqlite.org' Subject: SQLite (1.0.97) access via LAN We are developing Windows applications with SQLite.dll. The current situation with VisualStudio-2010 is as follow: For x32 target compilation with System.Data.SQLite-x32-1.0.97.dll (.NET4) My application works fine. 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 "\\\\PC-Name\\C\\FolderName\\data.db <file:///\\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. Best regards, Takashi Fukuda takashifukuda at comcast.net --- ??E???????? ????????????????????????? http://www.avast.com