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WriteItemValue waits for indefinite amount of time.

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support
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22 Sep 2014 17:05 #2329 by support

Replied by support on topic WriteItemValue waits for indefinite amount of time.

The dialog box comes from C++ runtime library. QuickOPC has some C++ parts internally. it is likely that the WriteItemValue method does not return because the dialog box is waiting for user input, or in relation to it.

Unfortunately we do not support version 5.12 any longer, plus we would need a reproducible case to work on it. There have been many improvements, and also bug fixes, since version 5.12 (current versions are QuickOPC 5.31 if you can use .NET 4.5, or version QuickOPC 5.23 for .NET 3.5 or 4.0).

My suggestion is that you rebuild the app with one of these current versions, and check if the problem persists.

Best regards

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saravana48
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22 Sep 2014 12:52 - 22 Sep 2014 12:55 #2328 by saravana48

Replied by saravana48 on topic WriteItemValue waits for indefinite amount of time.

Thanks for reply.

I have used the QuickOPC 5.12.1308.1

I have found the issue with the help of log information.

Code:
objLog.WriteLine ("Write to PLC started.")
m_opcServer.WriteItemValue(ServerName, ServerID, tagName, value)
objLog.WriteLine ("Write to PLC completed.")

Log File - output:
Write to PLC started.

The WriteItemValue() doesn't throw any exception, and the application became not responding.

Last edit: 22 Sep 2014 12:55 by saravana48.

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22 Sep 2014 11:53 #2327 by support

Replied by support on topic WriteItemValue waits for indefinite amount of time.

Which version and build of QuickOPC are you using please?

Hint: find the QuickOPC under C:\Program Files [(x86)] folder, then select one of the assemblies (.DLL) in the Assemblies subfolder, right-click, select Properties, and switch to the Details tab.

Best regards

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saravana48
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22 Sep 2014 05:39 - 22 Sep 2014 05:43 #2324 by saravana48

WriteItemValue waits for indefinite amount of time. was created by saravana48

The WriteItemValue function waits for indefinite amount of time, which throws the following error.

Event viewer error details:

Faulting application name: Test.exe, version: 1.0.0.0, time stamp: 0x511b6075
Faulting module name: MSVCR90.dll, version: 9.0.30729.6161, time stamp: 0x4dace5b9
Exception code: 0x40000015
Fault offset: 0x0005beae
Faulting process id: 0x20a8
Faulting application start time: 0x01cfd2d637b93067
Faulting application path: Test.exe
Faulting module path: C:\Windows\WinSxS\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.6161_none_50934f2ebcb7eb57\MSVCR90.dll
Report Id: 2c6649f8-3ef1-11e4-b94a-f8b156a6b48a

Note: The error occurs rarely not all the time.

Last edit: 22 Sep 2014 05:43 by saravana48.

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