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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
QuickOPC ReadItemValue() hangs
Category: Reading, Writing, Subscriptions, Property Access
Topic started 04 Jul 2016 15:33, by Vogelbacher
Last Post 08 Jul 2016 07:32
by Vogelbacher
Replies:7
Views:6656
Last Post by Vogelbacher
08 Jul 2016 07:32
QuickOPC DA COM VB6 [order of item change events]
Category: Reading, Writing, Subscriptions, Property Access
Topic started 15 Jun 2016 06:14, by support
Last Post 16 Jun 2016 08:55
by support
Replies:5
Views:5557
Last Post by support
16 Jun 2016 08:55
Writing PHP Error
Category: Reading, Writing, Subscriptions, Property Access
Topic started 30 May 2016 15:56, by pburgos
Last Post 30 May 2016 16:09
by support
Replies:1
Views:4579
Last Post by support
30 May 2016 16:09
How to pass a pointer to the CallBack method assigned to an item by "SubscribeMultipleItems" method in VS C++?
Category: Reading, Writing, Subscriptions, Property Access
Topic started 01 Mar 2016 17:00, by fluppe
Last Post 09 Mar 2016 08:44
by fluppe
Replies:5
Views:5397
Last Post by fluppe
09 Mar 2016 08:44
ReadItemValue is working very slowly
Category: Reading, Writing, Subscriptions, Property Access
Topic started 21 Oct 2015 02:35, by mikeboiko
Last Post 16 Jan 2016 06:37
by support
Replies:11
Views:11.2k
Last Post by support
16 Jan 2016 06:37
Determine active subscriptions
Category: Reading, Writing, Subscriptions, Property Access
Topic started 08 Dec 2015 07:54, by Romaco123
Last Post 08 Dec 2015 13:59
by support
Replies:3
Views:5038
Last Post by support
08 Dec 2015 13:59
Where can I find documentation about what errorcodes mean?
Category: Reading, Writing, Subscriptions, Property Access
Topic started 06 Jul 2015 14:05, by Nephilim777
Last Post 11 Jul 2015 08:40
by support
Replies:1
Views:4374
Last Post by support
11 Jul 2015 08:40
Separate Connections
Category: Reading, Writing, Subscriptions, Property Access
Topic started 10 Jun 2015 08:38, by support
Last Post 10 Jun 2015 08:40
by support
Replies:1
Views:4332
Last Post by support
10 Jun 2015 08:40
Filling Excel cells with results.
Category: Reading, Writing, Subscriptions, Property Access
Topic started 24 Feb 2015 10:26, by HansHartl
Last Post 05 Mar 2015 10:21
by HansHartl
Replies:5
Views:5255
Last Post by HansHartl
05 Mar 2015 10:21
How to set DataSource and value age
Category: Reading, Writing, Subscriptions, Property Access
Topic started 10 Dec 2014 20:36, by pgilbert
Last Post 11 Dec 2014 16:49
by pgilbert
Replies:2
Views:4808
Last Post by pgilbert
11 Dec 2014 16:49
Responsiveness of Reads
Category: Reading, Writing, Subscriptions, Property Access
Topic started 10 Nov 2014 23:55, by pgilbert
Last Post 15 Nov 2014 09:49
by support
Replies:3
Views:5008
Last Post by support
15 Nov 2014 09:49
How to Decode the DAVtq ?
Category: Reading, Writing, Subscriptions, Property Access
Topic started 06 Nov 2014 21:23, by pgilbert
Last Post 07 Nov 2014 20:21
by pgilbert
Replies:8
Views:6527
Last Post by pgilbert
07 Nov 2014 20:21
Can't Creat object in Windows 8.1 64 Bit
Category: Reading, Writing, Subscriptions, Property Access
Topic started 07 Oct 2014 14:49, by Dirk
Last Post 08 Oct 2014 14:50
by support
Replies:3
Views:5312
Last Post by support
08 Oct 2014 14:50
How to adjust the time-out while using ReadItemValue
Category: Reading, Writing, Subscriptions, Property Access
Topic started 21 Sep 2014 06:26, by support
Last Post 21 Sep 2014 06:52
by support
Replies:1
Views:3896
Last Post by support
21 Sep 2014 06:52
Sample c++ code (subscribe, error handling, MFC)
Category: Reading, Writing, Subscriptions, Property Access
Topic started 10 Sep 2014 08:17, by support
Last Post 11 Sep 2014 06:11
by support
Replies:3
Views:5079
Last Post by support
11 Sep 2014 06:11
Proper error handling in the ItemChanged event handler
Category: Reading, Writing, Subscriptions, Property Access
Topic started 05 Sep 2014 11:59, by support
Last Post 05 Sep 2014 12:00
by support
Replies:1
Views:3821
Last Post by support
05 Sep 2014 12:00
QuickOPC and MSExcel
Category: Reading, Writing, Subscriptions, Property Access
Topic started 06 Jun 2014 14:52, by Flintstone
Last Post 06 Jun 2014 21:00
by Flintstone
Replies:2
Views:5501
Last Post by Flintstone
06 Jun 2014 21:00
QuickOPC install in Visual Studio 2010 C++. ReadMultipleItems example
Category: Reading, Writing, Subscriptions, Property Access
Topic started 14 May 2014 12:41, by forestro
Last Post 28 May 2014 06:31
by support
Replies:12
Views:16.7k
Last Post by support
28 May 2014 06:31
QuickOPC-COM C++ Application crashing on callback
Category: Reading, Writing, Subscriptions, Property Access
Topic started 10 Mar 2011 09:24, by support
Last Post 27 May 2014 06:29
by support
Replies:7
Views:5411
Last Post by support
27 May 2014 06:29
OPC in Microsoft Access (subscriptions)
Category: Reading, Writing, Subscriptions, Property Access
Topic started 15 Apr 2014 07:43, by support
Last Post 15 Apr 2014 07:50
by support
Replies:3
Views:4913
Last Post by support
15 Apr 2014 07:50
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