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  5. QuickOPC-Classic in .NET
  7. Reading, Writing, Subscriptions, Property Access
  9. WriteItemValue -> "Exception from HRESULT: 0xC004D004"

WriteItemValue -> "Exception from HRESULT: 0xC004D004"

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02 Dec 2010 15:57 #150 by support
Replied by support on topic Re: WriteItemValue -> "Exception from HRESULT: 0xC004D004"
I am glad it has been resolved.
Best regards,
Zbynek Zahradnik

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02 Dec 2010 13:09 #149 by jorma.sarnikorpi@ontec.fi
Replied by jorma.sarnikorpi@ontec.fi on topic Re: WriteItemValue -> "Exception from HRESULT: 0xC004D004"
Hello,
Problem solved! It seems that problem was caused by FSGateway. I did update it to version 1.5 SP1 and after this I was able to write values without exceptions.

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26 Nov 2010 07:31 #144 by jorma.sarnikorpi@ontec.fi
Replied by jorma.sarnikorpi@ontec.fi on topic Re: WriteItemValue -> "Exception from HRESULT: 0xC004D004"
Thank you very much!
Best Regards,
Jorma

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25 Nov 2010 16:19 #143 by support
Replied by support on topic Re: WriteItemValue -> "Exception from HRESULT: 0xC004D004"
Yes. At this point I do not know help I can help your further; the investigation needs to be on the OPC Server part. If you needed something like precise name of the function returning the error, and the parameters used to call that function, I can work with you and try to obtain such information - let me know. From the log, however, the error appears to be more related to some kind of device communication, and not much to the OPC-facing interface.
Best regards,
ZZ

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25 Nov 2010 11:12 #142 by jorma.sarnikorpi@ontec.fi
Replied by jorma.sarnikorpi@ontec.fi on topic Re: WriteItemValue -> "Exception from HRESULT: 0xC004D004"
Hello,
I am using Wonderware FSGateway 1.5. I couldn't find any decent documentation to its error codes. But I found following entries from log of FSGateway:
Timed out waiting for CAL to return Poke acknowledgement for item
Item 'ai_H_LTE_SP_7' poke failed

So, I guess you are right; error comes from OPC Server.

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25 Nov 2010 10:07 #141 by support
Replied by support on topic Re: WriteItemValue -> "Exception from HRESULT: 0xC004D004"
This particular error code does not appear to be coming from the QuickOPC.NET component; its origin is likely in the OPC Server itself.

What is the OPC server you are using?
Is there any documentation to its error code?

Many thanks
Zbynek Zahradnik

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24 Nov 2010 13:39 #140 by jorma.sarnikorpi@ontec.fi
WriteItemValue -> "Exception from HRESULT: 0xC004D004" was created by jorma.sarnikorpi@ontec.fi
Hello,
I am using method WriteItemValue(). It takes something like 30 seconds and then there comes out exception "Exception from HRESULT: 0xC004D004". Interesting thing is that value _is_ written into the item (I can see its value changing).
I can also read corresponding item without problems using ReadItem().
Any ideas what is going on?

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  1. Forum
  3. Discussions
  5. QuickOPC-Classic in .NET
  7. Reading, Writing, Subscriptions, Property Access
  9. WriteItemValue -> "Exception from HRESULT: 0xC004D004"
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