Professional OPC
Development Tools

logos

Online Forums

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.

× If you are developing in .NET, but are using the OPC-UA (OPC Unified Architecture), please post in the QuickOPC-UA category instead.

An OPC operation failure with error code 0x800401F3

More
08 Jan 2020 07:32 #8120 by support
Hello,
I am not sure if my recent reply went into the system, so briefly repeating: Can you please explain/elaborate on "Using a server simulator, the c# code has proven to be functional"? - I have not understood this part.

Also, have you tried some other OPC client, and what were the results?

As to the computer name, "localhost" or the machine should work for the local computer, but the best choice is to use an empty string.

Best regards

Please Log in or Create an account to join the conversation.

More
07 Jan 2020 16:43 #8116 by Ronald B. Livesay
This is the culprit: object x = _client.ReadItemValue( _Machine, _Server, _Tag );
where
private readonly EasyDAClient _client = new EasyDAClient();
using OpcLabs.EasyOpc.DataAccess;

Windows 10, Visual Studio Enterprise 2019, Winforms, c#

Server is Kepware (Kepware.KEPServerEX.V6) running on the same computer

Searches at OPC Labs for the error code (0x800401F3) have not proven very helpful

The Exception is:
An OPC operation failure with error code -2147221005 (0x800401F3) occurred, originating from 'OpcLabs.EasyOpcRaw.DataAccess.RawEasyDAClient' and with depth of 1. The inner exception contains details about the problem.

Inner Exception is:
Invalid class string + The client method called was 'ReadMultipleItemValues'.

In the call to ReadItemValue:
_Machine has been various values {e.g. "","localhost", actual machine name, etc.}
_Server is always Kepware.KEPServerEX.V6
_Tag is a tag known to exist in the Kepware server (e.g. XT1-P2)

Kepware is running fine with the Kepware tools showing usual stuff

Using a server simulator, the c# code has proven to be functional
Attachments:

Please Log in or Create an account to join the conversation.

Moderators: support
Time to create page: 0.064 seconds