Solved

DCOM Component failure "Class not registered"

Posted on 2008-10-16
2
1,295 Views
Last Modified: 2013-11-29
How do I ensure a COM component is registered for use? Are there any checks we can make to ensure it? This error is coming from a vendor product which uses DCOM to communicate to a backend system. We have other servers which are working fine, but we have two servers which are not. Checking the configurations on dcomcnfg.exe has resulted in the same settings for both the working and non-working systems.  If I use a working system and connect to the backend of the non-working system - it also works so it points directly to the non-working servers.  Any help would be great!
PS: The two servers in question have been recently rebuilt using standard scripts.
I would like to request since I haven't received any responses to this query if anyone knows of any tools for DCOM based sniffing or a known network tool and how to identify the communications for DCOM within it.  Wish I could raise the points but it is at the max.
Thanks, In Advance,
0
Comment
Question by:spinewr
2 Comments
 
LVL 4

Accepted Solution

by:
barnesd1 earned 500 total points
ID: 22865663
I take it these components are Activex DLLs.  They need to be registered with regsvr32 c:\windows\system32\mydll.dll.  They also need to be setup in component services.  An example of doing this is at http://msdn.microsoft.com/en-us/library/ms878113(EXCHG.65).aspx.  You should also check what user this component needs to run under - compare this with the working servers.  How this helps.
0
 

Author Comment

by:spinewr
ID: 22902406
Thanks Barnesd1, you are the first to at least review the question.  I actually have Microsoft working on the problem wth us now.  We have tested SQL connectivity using a test UDL flle, ODBC connectivity using SQL and done a trace in ODBC which is not giving us much information. I will accept your answer because it is now a vendor problem. The UDL file and ODBC connecitivity tests are working and the connect string from the application is throwing an SSL error (which the company swears they have not done any SSL implementation.  We are next going with a NetMon trace to see if that gives us more information.
0

Featured Post

Why are Office 365 signatures so complicated?

Trying to setup transport rules for Office 365 email signatures and can’t quite figure it out? Having to test the signature over and over? Make things simple by using Exclaimer Cloud - Signatures for Office 365.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Several part series to implement Internet Explorer 11 Enterprise Mode
Sometimes drives fill up and we don't know why.  If you don't understand the best way to use the tools available, you may end up being stumped as to why your drive says it's not full when you have no space left!  Here's how you can find out...
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.
With the advent of Windows 10, Microsoft is pushing a Get Windows 10 icon into the notification area (system tray) of qualifying computers. There are many reasons for wanting to remove this icon. This two-part Experts Exchange video Micro Tutorial s…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now