Object reference not set to an instance of an object. 9/21/2015 1:31:49 PM at Supervisore.clsgestione_glb.configura_linea() in C:\Supervisor\Supervisore_12059_linea 2\12059_linea 2\Sorgenti\Supervisore\Clsgestione_glb.vb:line 694 Access to the path 'C:\Supervisor' is denied. 9/21/2015 1:31:59 PM at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options) at System.IO.StreamReader..ctor(String path, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize) at System.IO.StreamReader..ctor(String path) at Supervisore.clsfunction.Leggi_file_testi(String path_loc) in C:\Supervisor\Supervisore_12059_linea 2\12059_linea 2\Sorgenti\Supervisore\Clsfuncion.vb:line 503 Access to the path 'C:\Supervisor' is denied. 9/21/2015 1:32:03 PM at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options) at System.IO.StreamReader..ctor(String path, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize) at System.IO.StreamReader..ctor(String path) at Supervisore.clsfunction.Leggi_file_testi(String path_loc) in C:\Supervisor\Supervisore_12059_linea 2\12059_linea 2\Sorgenti\Supervisore\Clsfuncion.vb:line 503 Access to the path 'C:\Supervisor' is denied. 9/21/2015 1:32:04 PM at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options) at System.IO.StreamReader..ctor(String path, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize) at System.IO.StreamReader..ctor(String path) at Supervisore.clsfunction.Leggi_file_testi(String path_loc) in C:\Supervisor\Supervisore_12059_linea 2\12059_linea 2\Sorgenti\Supervisore\Clsfuncion.vb:line 503 Access to the path 'C:\Supervisor' is denied. 9/21/2015 1:32:04 PM at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options) at System.IO.StreamReader..ctor(String path, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize) at System.IO.StreamReader..ctor(String path) at Supervisore.clsfunction.Leggi_file_testi(String path_loc) in C:\Supervisor\Supervisore_12059_linea 2\12059_linea 2\Sorgenti\Supervisore\Clsfuncion.vb:line 503 Access to the path 'C:\Supervisor' is denied. 9/21/2015 1:32:04 PM at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options) at System.IO.StreamReader..ctor(String path, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize) at System.IO.StreamReader..ctor(String path) at Supervisore.clsfunction.Leggi_file_testi(String path_loc) in C:\Supervisor\Supervisore_12059_linea 2\12059_linea 2\Sorgenti\Supervisore\Clsfuncion.vb:line 503 Object reference not set to an instance of an object. 9/21/2015 1:32:05 PM at Supervisore.clsgestione_glb.Compila_Form_Padre() in C:\Supervisor\Supervisore_12059_linea 2\12059_linea 2\Sorgenti\Supervisore\Clsgestione_glb.vb:line 1499 at Supervisore.Frmopzioni.Button3_Click(Object sender, EventArgs e) in C:\Supervisor\Supervisore_12059_linea 2\12059_linea 2\Sorgenti\Supervisore\Frmopzioni.vb:line 55