WIA Scanner works with TWAIN methods but not WIA methods

Discussions about WIA scanning in GdPicture.NET using GdPictureImaging.
Post Reply
gabriel91
Posts: 1
Joined: Thu Apr 11, 2013 11:20 pm

WIA Scanner works with TWAIN methods but not WIA methods

Post by gabriel91 » Thu Apr 11, 2013 11:24 pm

I think this is a weird error. I have an EPSON scanner that installs both TWAIN and WIA drivers. If I call TWAINAcquitreToGdPictureImage() with the WIA scanner name it works, but if I call WiaAcquireToGdPictureImage() with the sourceId, it just returns 0. How can this be?

carine14
Posts: 2
Joined: Tue Oct 17, 2017 11:35 am

Re: WIA Scanner works with TWAIN methods but not WIA methods

Post by carine14 » Mon Nov 27, 2017 8:40 am

If a device can have two or more drivers, test these drivers thoroughly for compatibility with each other. For example, if one driver leaves the device in an unusable state (such as the driver not sending the close session message in some protocol), the other driver might fail when it tries to communicate with the device. This situation happens often with serial devices.

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest