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 TwainDemo doesn't show devices on Windows10 64bit
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2 Posts

Posted - May 11 2019 :  18:18:02  Show Profile  Reply

I ran into a problem with the original TwainDemo on Windows 10 Pro 64bit.
If I compile for Windows 32 everything is fine and the devices are all shown in the combobox.
If I complie for Windows 64 no device is shown.

Am I doing something wrong? Is it not implemented?

Talking about
ImageEn 8.3 with Source
Delphi 10.2 Update 2
Windows 10 Pro 64bit


60 Posts

Posted - May 12 2019 :  04:53:39  Show Profile  Reply

This is a bug, which I reported just several months ago.

So I use only the 32 Bit version.

Sincerely Peter
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5058 Posts

Posted - May 12 2019 :  17:21:36  Show Profile  Reply
Actually, I'm not aware that that's a bug. 64bit apps require 64bit drivers, which are generally not installed.

Have you tried another 64bit scan app to confirm your drivers?

Xequte Software
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2 Posts

Posted - May 13 2019 :  09:33:05  Show Profile  Reply
Thanks to both of you for your infos!
I wasn't aware of that.
So I have to switch to WIA for scanning in a 64bit application since I didn't even find information about 64bit drivers. Drivers for Windows 10 64bit are apparently not sufficient.
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