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Technical support is provided through Support Forums below. Anybody can view them; you need to Register/Login to our site (see link in upper right corner) in order to Post questions. You do not have to be a licensed user.

OPC Labs team is actively monitoring the forums, and provides answers as soon as possible. For your convenience, we have also assembled a Frequently Asked Questions page.

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HINT: You may use the Search feature (magnifier icon below) in the forums to locate the information you need. You can also search our entire Web site (the search box in the upper right corner of every page).
 
 
SupportSupportDiscussions (re...Discussions (re...QuickOPC-ClassicQuickOPC-ClassicQuickOPC.NET QuickOPC.NET Crashing IISCrashing IIS
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 11/21/2011 3:56 AM
 
OPC Labs Technical Support
6th Level Poster

Joined: 3/15/2010
Posts: 591

This is to let you know that we are working on the problem but were so far unable to reproduce it. The current test we have performs ReadItem-s in a loop, and is executed by multiple calling threads, but outside IIS. This has not crashed. Next attempt will be with Web application under IIS.

Regards
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 11/21/2011 10:34 AM
 
OPC Labs Technical Support
6th Level Poster

Joined: 3/15/2010
Posts: 591
 Modified By OPC Labs Technical Support on 11/21/2011 8:36:07 PM

Load tests under IIS resulted in a single crash, which could not be reproduced further. It was in Debug configuration, and it manifested itself as an ASSERT failure. Because of this difference, and inability to reproduce it more times, I could not tell with certainty that it was the same thing as you are seeing, but it is quite possible. I have made a fix, and we are now testing it. I will let you know when a build with the fix is ready.
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 11/22/2011 4:25 AM
 
OPC Labs Technical Support
6th Level Poster

Joined: 3/15/2010
Posts: 591

The new build is available from the Downloads page. Verification: It is labeled 5.11.481.1 or later.
New Post
 12/13/2011 9:46 AM
 
julian
No Ranking

Joined: 10/4/2011
Posts: 14
 Modified By OPC Labs Technical Support on 12/18/2011 6:48:26 PM

Hi,
We've been unable to resolve the issue with the component. Because we require only a single function call "readItem" I've built an OPC component in C++ that performs the task. [.....]
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