EnableDS throws AccessViolation in 64bit Application

[Nithya G]

Hi,

We have migrated our c# Scanning feature to 64-bit. When i am calling EnableDS function, it throws AccessViolation(Attempted to read write protected memory) Exception in Windows 10 machine whereas in Windows 7 it is working fine. I am using Twain 2.1 DS Sample as my Data source.

Please someone help me on this issue.

Thanks in advance.

[Mark McLaughlin]

The open source TWAIN C# project demonstrates communicating with TWAIN using C#, I recommend checking it to see how it marshals the data for communicating with a TWAIN Driver. The repository is here: https://github.com/twain/twain-cs

[Nithya Gnanasekar]

Mark,

I am receiving accessViolation in FreeImagex64.dll.

I have analyzed Twain c# Project and it built on .Net Framework version 3.5. From one of the third party website, they mentioned “64-bit TWAIN Free Image Scanner virtual TWAIN driver” doesn’t have support in higher version of .Net Framework. When I set 3.5 framework for my application, it works fine. Please provide your comments.

Thanks.

[Author]

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