System.Management.ManagementScope ms = new System.Management.ManagementScope("\\\\" + stringMachineName + "\\root\\cimv2", co);

oq = new System.Management.ObjectQuery("SELECT * FROM Win32_processor");

query = new ManagementObjectSearcher(ms, oq);

return queryCollection;

well guys i am trying to access remote system but in doing this some machines give mein following exception

System.interop.Runtime.COmException

RPC SERVER IS unavailable (Exception from Hresult:0x800706BA)

can u help me this how to solve this

We use a third-party firewall product that I was unaware of. When I configured it to allow my IP address access to the server, my problem went away.

thx,

todd

This could have one of many reasons, namely the machine name is wrong etc.

Check out this article.

http://support.microsoft.com/default.aspx?scid=kb;en-us;Q224370

JK,

Did you ever get this resolved? I have the same problem...

Make Sure the path and nameto the Remote machine is correct and RPC services are running on that.

Yes, I have verified that the RPC and WMI services are running on the remote computer. I am also able to ping the server. I have also verified that the server computer does not have the Microsoft Firewall enabled.

The only thing I am not certain about is that the account I am using is found on a domain server (i.e., local accounts are not being used). Do I have to format the user ID I am passing in a particular way (e.g., domainName\userID)? Do I have to set any of the other properties on the ConnectionOptions class besides user name and password?

I'm at a lost. Any help you can provide would be appreciated.

todd

The domain administrator have complete rights on the computer under that domain, so I think if you are providing correct username, password then it should work, But when I see your exception message it seems that problem is not here with Connection Crednitials.

Anyways Try as much things as possible, See RPC and RCP locator services are up and running on the remote machine.

Best of luck ;-)

One important thing is that try searching google for this error "Hresult:0x800706BA" this will tell you the exact cause of the problem.

Best Regards,

Have a look here:

I hope this will solve your problem:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=239140&SiteID=1

Best Regards and Best of Luck ;-)

Hello Jahangir,

The Exceptoin: RPC SERVER IS unavailable (Exception from Hresult:0x800706BA) results from a "wrong" call to Your WMI Provider. Can you post Your connectionoptions (You used as Variable co ).

If You run Your Application locally You may use the following:

System.Management.ManagementScope ms = new System.Management.ManagementScope(\\\\ +"." + "\\root\\cimv2", co);

(I replaced the string Variable which holds the computername with . - it represents the local Computer WMI Provider.

We use a third-party firewall product that I was unaware of. When I configured it to allow my IP address access to the server, my problem went away.

thx,

todd