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AuthorForum: General Questions
Topic: SSL Libraries Loading Error
Dib Oglesby

From: Richmond, VA USA
Posts: 3
Member Since: 06/20/11
posted July 26, 2011 9:23 AM

Hello,

We are using an older version of the AxHTTP control in our application. One user is getting an error when they try and update files from our site:

The application experienced an internal error loading the SSL libraries.

This error message comes from the Microsoft error ERROR_INTERNET_SECURITY_CHANNEL_ERROR

It seems like it could be related to certificates and HTTPS, but there isn't a whole lot of info online. Have you encountered this error before? I believe the solution is on the user's end, but would like to have something to tell them to do.

Thanks
Nick B (Admin)

From: Utica, NY USA
Posts: 578
Member Since: 05/25/10

Extra Support Options
Custom Application Development

posted July 26, 2011 3:10 PM

Hello,

Is the issue resolved if you use the current version?

What OS are you using?
Dib Oglesby

From: Richmond, VA USA
Posts: 3
Member Since: 06/20/11
posted July 27, 2011 1:58 PM

AxInterop.DartWeb.dll v1.0.0.0

Not sure what Windows version the user is running.
Dib Oglesby

From: Richmond, VA USA
Posts: 3
Member Since: 06/20/11
posted July 27, 2011 5:26 PM

Is there any way the axHTTP control would fail to download a file, but not throw an error. We are seeing that the code thinks everything was fine, but the file does not get updated.
Jason Farrar (Admin)

From: USA
Posts: 223
Member Since: 07/24/07

Extra Support Options
Custom Application Development

posted July 28, 2011 10:42 AM

To be able help you better we need to know what OS the User is running on as well as the version of Internet explorer that they have. We also would like to know the version of the PowerTCP Web for ActiveX dll that you are using, this dll can be found in your System32(32-bit OS) or SysWow64(64-bit OS) directory. Alternatively you can run the Dartnostics shortcut from the PowerTCP Web Program Files menu.

You are right, the ERROR_INTERNET_SECURITY_CHANNEL_ERROR error is usually associated with a problem concerning certificates.

Possible causes range from using a server side certificate as a client certificate to missing keys, the list is long and this error is used as a catch all error. You should have your user check the Event Log on the computer they are seeing the problem with as the error may have been logged there with more specific information regarding what the problem might be.

If possible it would probably help to have them try the url being requested in your application with Internet Explorer to see if that works as our control uses the same wininet dll that IE uses.

For the second issue, I can't really think of a reason why the download would fail. However it is possible that the file is being retrieved from the cache, you can set the Cache property of the control to False then try downloading the file to see if it gets updated.

To troubleshoot any further you will have to monitor the http traffic to make sure the file is actually being sent by the server with a network sniffing utility such as wireshark or an http debug proxy like fiddler2.

If you want to provide us with a simple, stripped down application that demonstrates any of the problems you have mentioned we will be happy to take a look at it. You can send the project(s) in a zip file to support@dart.com, please make sure that you do not leave a any binary or executable files in the zip as it will
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