Error while accessing COM in WCF service

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Hello,

I have developed one WCF service and one of the method of service is using COM component but when this method tries to create instance of COM then it returns below error:

"Creating an instance of the COM component with CLSID {D64DB4A9-3B26-4D2B-B556-9DA433C54175} from the IClassFactory failed due to the following error: 80070005"

what permissions I need to set and where?

Thanks

Posted 24-Aug-11 23:28pm

Mansi Trivedi

Updated 24-Aug-11 23:32pm

Prerak Patel

v2

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#realJSOP · Answer 1 · 2011-08-24T23:42:00

I found this with google:

You may need to set launch permission to the com component for the windows user the apppool is running as in IIS. You can do it by running: dcomcnfg

and...

And set file permissions so the user can read the COM dll file.

Also check the COM's registration to see if the COM server supports being called in an MTA thread. Most COM servers requires STA which is not suitable for the MTA threads created by web services.

Prerak Patel · Answer 2 · 2011-08-24T23:42:00

Solution 1

Try DCOM config.
http://forums.asp.net/t/1239867.aspx/1[^]

Posted 24-Aug-11 23:42pm

Prerak Patel