[ Show ]
Support VoyForums
[ Shrink ]
VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 12345[6]78910 ]

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Date Posted: 18:05:12 01/30/02 Wed
Author: Michel
Subject: Re: Using Envision with TWAIN and USB Connections
In reply to: cthrall 's message, "Using Envision with TWAIN and USB Connections" on 16:00:25 01/30/02 Wed


I have tested on a few scanners that connect through the parallel port, one usb Agfa SnapScan 1212U, and Panasonic and Canon SCSI scanners.

Mark sure you are not scanning while running your program from the IDE debugger. I have seen that to make the program hang, something related to the twain message loop and the debugger.

Best regards,


>We have purchased the Envision Imaging Library and
>have created a product. All of our tests were down on
>scanners with SCSI connections. However, I have a user
>that is using a Canon scanner that uses a TWAIN driver
>with USB connectivity. The program is locking up on
>them. I am guessing it is trying to communicate to
>through the USB port and is having a cow. Should this
>be happening? Have you tested scanners using the
>Envision imaging library with scanners connected
>through a USB connection? They can use the Windows
>imaging utility software to connect and scan just fine.

[ Next Thread | Previous Thread | Next Message | Previous Message ]

[ Contact Forum Admin ]

Forum timezone: GMT-5
VF Version: 3.00b, ConfDB:
Before posting please read our privacy policy.
VoyForums(tm) is a Free Service from Voyager Info-Systems.
Copyright © 1998-2019 Voyager Info-Systems. All Rights Reserved.