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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 links in upper right corner) in order to Post questions. You do not have to be a licensed user of our product.

Please read Rules for forum posts before reporting your issue or asking a question. OPC Labs team is actively monitoring the forums, and replies as soon as possible. Various technical information can also be found in our Knowledge Base. For your convenience, we have also assembled a Frequently Asked Questions page.

Do not use the Contact page for technical issues.

Subject Replies / Views Last Post
Downgrade from .NET Framework 4.7.1 to 4.0
Category: General Issues, Building
Topic started 06 Feb 2020 09:21, by andis59
Last Post 06 Feb 2020 12:39
by support
Replies:1
Views:1599
Last Post by support
06 Feb 2020 12:39
EasyOPC UA Demo error with Visual Studio 2019 VB code
Category: General Issues, Building
Topic started 11 Nov 2019 14:05, by Sandro@More
Last Post 13 Nov 2019 14:10
by support
Replies:3
Views:1735
Last Post by support
13 Nov 2019 14:10
Using EasyDAClient and EasyUAClient in the same project
Category: General Issues, Building
Topic started 22 May 2019 05:54, by steven_harrap@hotmail.com
Last Post 22 May 2019 06:24
by support
Replies:1
Views:2332
Last Post by support
22 May 2019 06:24
Trial Version License is Expired
Category: General Issues, Building
Topic started 16 May 2019 15:01, by WJurasek
Last Post 16 May 2019 20:31
by support
Replies:3
Views:1923
Last Post by support
16 May 2019 20:31
Reference Implementation
Category: General Issues, Building
Topic started 10 May 2019 19:10, by chrisstankevitz
Last Post 11 May 2019 09:45
by support
Replies:1
Views:1586
Last Post by support
11 May 2019 09:45
Visual Studio 2017 Hangs when Compiling and Debugging
Category: General Issues, Building
Topic started 28 Jan 2019 18:35, by gkalipershad
Last Post 02 Mar 2019 19:42
by admin
Replies:6
Views:2573
Last Post by admin
02 Mar 2019 19:42
System.ThrowHelper.ThrowInvalidOperationException(System.ExceptionResource)
Category: General Issues, Building
Topic started 13 Feb 2019 09:44, by Sleepless
Last Post 14 Feb 2019 08:06
by support
Replies:3
Views:2879
Last Post by support
14 Feb 2019 08:06
Help, we're stuck!
Category: General Issues, Building
Topic started 26 Sep 2018 00:29, by bobday
Last Post 28 Sep 2018 08:35
by support
Replies:5
Views:3492
Last Post by support
28 Sep 2018 08:35
Application crashing - exception code of 0xc0000374 and both point to ...
Category: General Issues, Building
Topic started 09 Aug 2018 16:08, by support
Last Post 09 Aug 2018 16:08
by support
Replies:0
Views:9
Last Post by support
09 Aug 2018 16:08
Application crashing - exception code of 0xc0000374 and both point to ...
Category: General Issues, Building
Topic started 09 Aug 2018 15:15, by Restrepo
Last Post 09 Aug 2018 15:15
by Restrepo
Replies:0
Views:9164
Last Post by Restrepo
09 Aug 2018 15:15
"An invalid handle was specified" after app. 25 sec.
Category: General Issues, Building
Topic started 19 Jan 2018 15:17, by Renoo
Last Post 08 Jun 2018 05:31
by support
Replies:23
Views:15.9k
Last Post by support
08 Jun 2018 05:31
EasyUAClient StackOverflowException
Category: General Issues, Building
Topic started 22 May 2018 10:43, by fha
Last Post 31 May 2018 04:27
by fha
Replies:8
Views:3482
Last Post by fha
31 May 2018 04:27
EasyUA client access issues with VS 2013
Category: General Issues, Building
Topic started 04 Apr 2018 16:53, by Restrepo
Last Post 04 Apr 2018 16:53
by Restrepo
Replies:0
Views:2772
Last Post by Restrepo
04 Apr 2018 16:53
GUI popups when using QuickOPC
Category: General Issues, Building
Topic started 04 Jan 2018 22:08, by chrisstankevitz
Last Post 06 Jan 2018 17:35
by chrisstankevitz
Replies:2
Views:3683
Last Post by chrisstankevitz
06 Jan 2018 17:35
Exception when running UA code from QuickOpcCSharpExamples
Category: General Issues, Building
Topic started 04 Oct 2017 12:51, by WordsLikeJared
Last Post 04 Oct 2017 18:17
by WordsLikeJared
Replies:2
Views:3952
Last Post by WordsLikeJared
04 Oct 2017 18:17
OPC UA client problem with WinCC Siemens OPC server
Category: General Issues, Building
Topic started 21 Sep 2016 12:21, by support
Last Post 23 Sep 2016 07:53
by support
Replies:3
Views:10.7k
Last Post by support
23 Sep 2016 07:53
Nuget package changelog
Category: General Issues, Building
Topic started 03 Aug 2016 14:22, by UKPR
Last Post 14 Aug 2016 07:26
by support
Replies:2
Views:5185
Last Post by support
14 Aug 2016 07:26
VS2012 Building Issue
Category: General Issues, Building
Topic started 30 Mar 2015 21:33, by jamiejj
Last Post 01 Apr 2015 09:34
by support
Replies:4
Views:5433
Last Post by support
01 Apr 2015 09:34
MultiThreading and performance
Category: General Issues, Building
Topic started 16 Feb 2015 13:43, by cdunlap
Last Post 17 Feb 2015 16:29
by support
Replies:4
Views:5876
Last Post by support
17 Feb 2015 16:29
How to use the LogEntry event
Category: General Issues, Building
Topic started 01 Apr 2014 09:01, by support
Last Post 01 Apr 2014 09:29
by support
Replies:1
Views:5312
Last Post by support
01 Apr 2014 09:29
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