Problem running on Window 8.1

[TOR]

Hi all,

I’m getting an exception when trying to run my application on a Windows 8.1 64-bit machine.

The messages is as follows

“Attempted to read or write protected memory. This is often an indication that other memory is corrupt”.

It works fine on Windows 7 64-bit.

The twain log is as follows. I’m not too familiar what the log message means.

Any help would be appreciated and thanks in advance.

TWAIN_32.DLL – MESSAGE – CTwunk ::AppInitialize – Reset Log

TWAIN_32.DLL – MESSAGE – CTwunk ::OpenServer – Starting Thunker

TWAIN_32.DLL – MESSAGE – CTwunk ::CloseServer – Why Can’t We Find The Thunker Window?

TWAIN_32.DLL – MESSAGE – DSM –DsmEntryDiagExit (RC = 0, CC = 0)

TWAIN_32.DLL – MESSAGE – CTWTRACE–TwainDotNet(55) to NULL:

TWAIN_32.DLL – MESSAGE – CTWTRACE–CONTROL, IDENTITY, GETDEFAULT

TWAIN_32.DLL – MESSAGE – DSM –DsmEntryDiagExit (RC = 0, CC = 0)

TWAIN_32.DLL – MESSAGE – CTWTRACE–TwainDotNet(55) to NULL:

TWAIN_32.DLL – MESSAGE – CTWTRACE–CONTROL, IDENTITY, GETFIRST

TWAIN_32.DLL – MESSAGE – DSM –DsmEntryDiagExit (RC = 0, CC = 0)

TWAIN_32.DLL – MESSAGE – CTWTRACE–TwainDotNet(55) to NULL:

TWAIN_32.DLL – MESSAGE – CTWTRACE–CONTROL, IDENTITY, GETNEXT

TWAIN_32.DLL – MESSAGE – DSM –DsmEntryDiagExit (RC = 0, CC = 0)

TWAIN_32.DLL – MESSAGE – CTWTRACE–TwainDotNet(55) to NULL:

TWAIN_32.DLL – MESSAGE – CTWTRACE–CONTROL, IDENTITY, GETNEXT

TWAIN_32.DLL – MESSAGE – DSM –DsmEntryDiagExit (RC = 7, CC = 0)

TWAIN_32.DLL – MESSAGE – CTWTRACE–TwainDotNet(55) to EPSON DS-5500/6500/7500(56):

TWAIN_32.DLL – MESSAGE – CTWTRACE–CONTROL, USERINTERFACE, DISABLEDS

TWAIN_32.DLL – MESSAGE – DSM –DsmEntryDiagExit (RC = 1, CC = 0)

TWAIN_32.DLL – MESSAGE – CTWTRACE–TwainDotNet(55) to NULL:

TWAIN_32.DLL – MESSAGE – CTWTRACE–CONTROL, IDENTITY, CLOSEDS

TWAIN_32.DLL – MESSAGE – DSM –DsmEntryDiagExit (RC = 1, CC = C568)

TWAIN_32.DLL – MESSAGE – CTWTRACE–TwainDotNet(55) to WIA-EPSON DS-5500/6500/7500(57):

TWAIN_32.DLL – MESSAGE – CTWTRACE–CONTROL, USERINTERFACE, DISABLEDS

TWAIN_32.DLL – MESSAGE – DSM –DsmEntryDiagExit (RC = 1, CC = C568)

TWAIN_32.DLL – MESSAGE – CTWTRACE–TwainDotNet(55) to NULL:

TWAIN_32.DLL – MESSAGE – CTWTRACE–CONTROL, IDENTITY, CLOSEDS

[TOR]

Found my problem. Was due to the way the source was being closed.

I used CloseDSOK with Windows 8 and CloseDS with Windows 7.

[TOR]

When closing the source with CLOSEDSOK I get another problem.

It fails to OPENDS when closed this way.

Anybody else run into this problem?

[TOR]

The CloseDSOK is actually not working on windows 8 and the CloseDS causes a memory access issue.

All out of ideas here.

[TOR]

Ok I got it to work correctly on Windows 8 with the new TwainDSM.dll.

New problem is that this library isn’t picking up the WIA deivces. The one default library that comes with windows does.

Seem to be having a conversation with myself here but going to put these replies to help other people with these problems.

[Eugene]

TOR, thanks for your post. I am experiencing similar issue as you had. However after I switched to twaindsm.dll, my program returns failure when try to OpenDSM. I am wondering whether the MarshalAs in the Identity struct need to be change after swtitch from twain_32.dll to twaindsm.dll. I would like apprecite any advice from you. Thanks.

The following is part of code.

1) Returns failure
DSMparent(appid, IntPtr.Zero, TwDG.Control, TwDAT.Parent, TwMSG.OpenDSM, ref hwndp)

2) Dll Import for the function
[DllImport(“twaindsm.dll”, EntryPoint = “DSM_Entry”, CharSet = CharSet.Ansi)]
private static extern TwRC DSMparent([In(), Out()]
TwIdentity origin, IntPtr zeroptr, TwDG dg, TwDAT dat, TwMSG msg, ref IntPtr refptr);

3) Definition of Identity Struct
[StructLayout(LayoutKind.Sequential, Pack = 2, CharSet = CharSet.Ansi)]
public class TwIdentity
{
// TW_IDENTITY
public IntPtr Id;
public TwVersion Version;
public short ProtocolMajor;
public short ProtocolMinor;
public int SupportedGroups;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 34)]
public string Manufacturer;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 34)]
public string ProductFamily;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 34)]
public string ProductName;
}

[Author]

Posts