Cisco NAC Agent Version 4.7.2010.0 Script Error

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Mar 29th, 2010
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Whenever this client opens up the NAC Agent to logon to our network, he is greeted with a few not so friendly errors that appear to be javascript/internet explorer related. Anyone have any suggestions how to fix this? We have uninstalled and reinstalled the agent multiple times but to no avail. Have also tried resetting IE settings to default and repairing IE. Nothing. Help? The first screengrab is of the script error window. The second is of what the agent looks like after it opens.


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netjustin Tue, 03/30/2010 - 09:31
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Did you try unchecking the "Check for server certificate revocation" option from Internet Properties -> Advanced in Internet Exploder?

samwainford Tue, 04/06/2010 - 08:46
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Thanks very much for the suggestion; we tried that. We had to open a TAC case and got this solution from Cisco, which worked:

This problem might be due to an improperly registered msxml3.dll . 

Please try the following procedure to reregister msxml3.dll  and then rerun the agent install

1. Uninstall the Cisco Nac Agent from the system.
    2. Just to be sure manually wipe out directory "C:\Program 
Files\Cisco\Cisco NAC Agent" in case the uninstall left anything behind.
    3. Download regrserv32a.exe from
    4. Run regserva.exe - this will extract regserv32.exe on disk
    5. Open a command prompt and cd to the directory where regserv32.exe
    6. Run regsvr32.exe msxml3.dll (it will pop up a dialog saying the 
registration was successful.
    7. Then re-install the NACAgent.
    8. Agent should now pop up (script error symptom should now be 



Manivannan Srinivasan

Cisco TAC


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