Scanner only shown with TWAIN 1.x DSM

[Eco]

Hello,

i have a problem using a HP Scanjet 7650 with a TWAIN 2 application, the scanner is not available in the TWAIN scanner selection dialog. I’ve reproduced this behaviour with the twacker-tool from Twain.org, when i activate the usage of TWAIN 2.0, the scanner is not shown in the dialog. Setting twacker to twain 1, the scanner is shown and works.

The problem occurs on a Windows 2003 server, using citrix terminal server.

What i’ve already checked:
– TWAIN_32 directory
– twain.dll and twain32.dll files (Windows-directory)
– twaindsm.dll (Windows-System32)
– deleted TWAIN_32-directory from windows-user-dir
– configure registry to ignore TWAIN_32 in user’s dir for the application

What else could cause this behaviour and how can i solve it?

Thank you for your help!

Best regards

[Kaij]

One question one the way to answer your question:

Is Windows 2003 Server 32 bit or 64 bit?

Best regards,
Kaij

http://www.jse.de

[Eco]

I’m not sure, i think, it is 32-bit.

I found a similar problem in the citrix-forums: http://forums.citrix.com/thread.jspa?threadID=329678&tstart=15
Seems to be a bug in the citrix-twain redirection when using version 2.x.

Meanwhile we fixed the problem in our application via optional usage of the twain 1.x version interface.

Thank you anyway for your answer.

[Author]

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