VintaSoft Tech Community

When I call Device.open, I get a Twain Error: "General failure in response to DAT_CAPS. Bad protocol error."

This happens in my own code, but also in the demos provided by VintaSoft. The error is shown in a message box, displayed by the scanner software.

My scanner is a VistaScan, used to scan dental radiographies, so not a very common equipment.

After I close the message, scanning proceeds and I can acquire the images.

My setup: Windows 8 64bits, VintaSoftTwain.NET SDK 8.3 (x86), scanner uses Twain 1.9. Same problem happens on a Windows 7 machine. I have tried changing various parameters, to no avail.

I'm about to purchase Vintasoft's solution, but cannot until this problem is solved. Please, can someone help me?

Thanks!

Hello,

Please generate log-file and send it to our support team at support@vintasoft.com for analyze.

Here are steps which you should do if you want to generate an extended log-file of scanner's work:
1. Enable logging (add the lines below to code of your application):
TwainEnvironment.EnableDebugging("d:\vstwain.log")
TwainEnvironment.DebugLevel = DebugLevel.Debug
2. Run your application.
3. Send us a log-file and detailed description of the problem.

Best regards, Alexander