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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.

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Subject Replies / Views Last Post
Server certificate verify disable
Category: Reading, Writing, Subscriptions, Property Access
Topic started 30 Apr 2021 14:51, by CHRDEI
Last Post 07 May 2021 04:51
by support
Replies:3
Views:1490
Last Post by support
07 May 2021 04:51
Best practice for subscribing to large numbers of tags
Category: Reading, Writing, Subscriptions, Property Access
Topic started 29 Jan 2021 12:55, by krito
Last Post 18 Feb 2021 09:32
by support
Replies:16
Views:2886
Last Post by support
18 Feb 2021 09:32
EasyDAClient.ReadItem not returning
Category: Reading, Writing, Subscriptions, Property Access
Topic started 19 Jan 2021 16:29, by DarrenYoung
Last Post 20 Jan 2021 09:47
by DarrenYoung
Replies:4
Views:1029
Last Post by DarrenYoung
20 Jan 2021 09:47
ReadItemValue Error
Category: Reading, Writing, Subscriptions, Property Access
Topic started 18 Dec 2020 15:35, by PythonByte
Last Post 22 Dec 2020 06:50
by support
Replies:4
Views:1099
Last Post by support
22 Dec 2020 06:50
ReadMultipleItemValues Function Error
Category: Reading, Writing, Subscriptions, Property Access
Topic started 07 Dec 2020 14:56, by PythonByte
Last Post 07 Dec 2020 19:18
by support
Replies:1
Views:904
Last Post by support
07 Dec 2020 19:18
WriteMultipleItemValues requestedDataType
Category: Reading, Writing, Subscriptions, Property Access
Topic started 23 Nov 2020 13:58, by PhilippeG
Last Post 24 Nov 2020 08:34
by support
Replies:1
Views:1101
Last Post by support
24 Nov 2020 08:34
Error when subscribing multiple items
Category: Reading, Writing, Subscriptions, Property Access
Topic started 16 Nov 2020 00:36, by janderscu
Last Post 19 Nov 2020 07:19
by support
Replies:12
Views:2883
Last Post by support
19 Nov 2020 07:19
Object reference not set to an instance of an object. QuickOPC 2020.3 alpha
Category: Reading, Writing, Subscriptions, Property Access
Topic started 26 Oct 2020 18:00, by Andriy
Last Post 12 Nov 2020 08:55
by Andriy
Replies:8
Views:2451
Last Post by Andriy
12 Nov 2020 08:55
Could not create a certificate via a proxy: Input file was not processed properl
Category: Reading, Writing, Subscriptions, Property Access
Topic started 29 Oct 2020 13:24, by kristof2015
Last Post 29 Oct 2020 18:53
by support
Replies:3
Views:1265
Last Post by support
29 Oct 2020 18:53
OPC-UA operation failure with error ID 'UAEngine=2307' occurred
Category: Reading, Writing, Subscriptions, Property Access
Topic started 23 Oct 2020 10:08, by k_ito@sehouse.co.jp
Last Post 24 Oct 2020 08:42
by support
Replies:1
Views:1481
Last Post by support
24 Oct 2020 08:42
Subscribing to a large number of tags, in parallel
Category: Reading, Writing, Subscriptions, Property Access
Topic started 06 Nov 2019 13:29, by DC
Last Post 16 Oct 2020 12:28
by DC
Replies:7
Views:1455
Last Post by DC
16 Oct 2020 12:28
Subscription mode. Catastrophic failure error -> blocked Subscribe/Unsubscribe
Category: Reading, Writing, Subscriptions, Property Access
Topic started 30 Oct 2019 16:47, by Andriy
Last Post 05 Oct 2020 16:07
by support
Replies:28
Views:7141
Last Post by support
05 Oct 2020 16:07
Extract host or ip address from OPC url string
Category: Reading, Writing, Subscriptions, Property Access
Topic started 08 Sep 2020 11:52, by Andriy
Last Post 08 Sep 2020 12:13
by support
Replies:1
Views:1019
Last Post by support
08 Sep 2020 12:13
Subscribing and reading large number of tags
Category: Reading, Writing, Subscriptions, Property Access
Topic started 10 Jul 2020 09:12, by FreegE
Last Post 10 Jul 2020 19:15
by support
Replies:1
Views:1530
Last Post by support
10 Jul 2020 19:15
XML-DA. Change subscribe parameters
Category: Reading, Writing, Subscriptions, Property Access
Topic started 08 May 2020 16:52, by Andriy
Last Post 21 May 2020 07:35
by Andriy
Replies:4
Views:1323
Last Post by Andriy
21 May 2020 07:35
XML-DA. Subscription is canceled unexpectedly
Category: Reading, Writing, Subscriptions, Property Access
Topic started 08 May 2020 16:35, by Andriy
Last Post 18 May 2020 07:10
by Andriy
Replies:4
Views:1265
Last Post by Andriy
18 May 2020 07:10
XML-DA. Disable advanced polled refresh
Category: Reading, Writing, Subscriptions, Property Access
Topic started 26 Feb 2020 11:12, by Andriy
Last Post 31 Mar 2020 08:10
by support
Replies:9
Views:1565
Last Post by support
31 Mar 2020 08:10
XML-DA. Control the number of subscriptions.
Category: Reading, Writing, Subscriptions, Property Access
Topic started 18 Feb 2020 15:02, by Andriy
Last Post 02 Mar 2020 15:50
by support
Replies:6
Views:1371
Last Post by support
02 Mar 2020 15:50
Typecasting using Genericdata in Delphi
Category: Reading, Writing, Subscriptions, Property Access
Topic started 19 Feb 2020 11:13, by Moien
Last Post 20 Feb 2020 08:21
by support
Replies:3
Views:1797
Last Post by support
20 Feb 2020 08:21
ArgumentException when reading OPC items
Category: Reading, Writing, Subscriptions, Property Access
Topic started 12 Feb 2020 11:31, by Andriy
Last Post 13 Feb 2020 13:21
by support
Replies:1
Views:989
Last Post by support
13 Feb 2020 13:21
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