<span style="font-family: "Tahoma","sans-serif"; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'">From:<span style="font-family: "Tahoma","sans-serif"; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'"> Zbynek Zahradnik
Sent: Saturday, November 20, 2010 3:50 PM
To: W.
<span style="font-family: "Tahoma","sans-serif"; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'">Subject: RE: Ghost 0xC0040007 Error
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">W.,
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">this not a known issue.
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">The component itself does not ever generate <span style="font-family: "Arial","sans-serif"; font-size: 10pt">0xC0040007 (OPC_E_UNKNOWNITEMID) or, in fact, any <span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">OPC-defined errors. This is valid in all versions.
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">In theory, a bug could exist that would cause the error – once reported to the component – appear somewhere else mistakenly (such as for different item). But even in wildest imagination, I do not think that the component can make it up completely.
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">If you have logged everything on your server, I suspect some other server may be in play.
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">If they were using latest version, I would be able to work with you and them to nail it down.
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">Other, possibly related stuff: Older versions have not retried AddItems for items that once returned such error. It would take some time to research when the re-try for this was implemented. Re-configuring the server, with such old version, would not help in getting rid of it. But if you see new AddItems for it, then it probably works fine.
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">
<span style="font-family: "Arial","sans-serif"; color: #1f497d; font-size: 10pt">Zbynek Zahradnik<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">
<span style="font-family: "Calibri","sans-serif"; color: #1f497d; font-size: 11pt">
<span style="font-family: "Tahoma","sans-serif"; font-size: 10pt">From:<span style="font-family: "Tahoma","sans-serif"; font-size: 10pt"> W.
Sent: Friday, November 19, 2010 10:05 PM
To: Zbynek Zahradnik
Subject: Ghost 0xC0040007 Error
<span style="font-family: "Arial","sans-serif"; font-size: 10pt">Hello Zbynek,
<span style="font-family: "Arial","sans-serif"; font-size: 10pt">We have a customer using the old v3.02 version of the Data.NET. I understand this version is unsupported but I want to find out if this error may be a known issue or not in that version. I will try to explain what they are doing and what the error they are seeing is.
<span style="font-family: "Arial","sans-serif"; font-size: 10pt">1. They loop through 750 items and call RequestItem on all the items.
<span style="font-family: "Arial","sans-serif"; font-size: 10pt">2. The get an error on some of the items which is 0xC0040007 "Item does not exist in server..."
<span style="font-family: "Arial","sans-serif"; font-size: 10pt">3. The Server is TOP Server. We have captured OPC Diagnostics that show a successful call to AddItems and then even callbacks for that item.
<span style="font-family: "Arial","sans-serif"; font-size: 10pt">My question is how could they be getting the error if TOP Server is not the one reporting it? They claim they are only connecting to the TOP Server. I am wondering if you have ever seen anything like this before with the older version? Do you have any other ideas why this erro would be happening?
<span style="font-family: "Arial","sans-serif"; font-size: 10pt">Thanks,
<span style="font-family: "Arial","sans-serif"; font-size: 10pt">W.
