System.UnauthorizedAccessException: Retrieving the COM class factory

Question

System.UnauthorizedAccessException: Retrieving the COM class factory for component with CLSID {5EFA39FA-B2C4-4A6E-84D6-C3333D1A3D07} failed due to the following error: 80070005.
I'm trying to deploy asp.net 2005 app with Crystal Reports XI Release 2. Reports are showing fine on the development machine. I install full designer on the production and that works fine too. but when the report is requested from aspx page, the error occurs. Iu2019ve been searching all over the web and found many posts. Most of them are resolved by using local admin account in various ways (web.config impersonation, ApplicationPool logon or COM object permissions). These solutions work for my app as well but running a web application under local admin account is really not a production solution. Does CrystalReports really require admin permissions to run on the server? Is there a way to run web page under default ASPNET account?
Thanks for any help.

Answer 1

Not necessarily, but you will have to figure out the minimum permissions you need. Use a utility like [Process Monitor|http://technet.microsoft.com/en-ca/sysinternals/bb896645.aspx] to figure out what needs permissions (look for Access Denied on files, folders and reg entries). Then give full permission and start limiting the permissions until it does not work.
You can also search for the guid or part of it (C3333D1A3D07) in the registry to find out what needs more permissions.
Ludek