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Cisco Secure ACS 3.0 for Windows 2000/NT Servers User Guide
78-13751-01, Version 3.0
Appendix A      Troubleshooting Information for Cisco Secure ACS
Installation and Upgrade Issues
Installation and Upgrade Issues
MaxSessions Issues
Condition
Recovery Action
The following error message 
displays when you try to upgrade 
or uninstall Cisco Secure ACS:
The following file is
invalid or the data is
corrupted "DelsL1.isu"
From the Windows NT/2000 Registry, delete the following registry 
key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersi
on\Uninstall\CiscoSecure
All previous accounting logs are 
missing.
If you are reinstalling or upgrading the Cisco Secure ACS software, 
the files are deleted unless moved to another directory location.
Condition
Recovery Action
MaxSessions over VPDN is not 
working.
The use of MaxSessions over VPDN is not supported.
User MaxSessions fluctuates or 
is unreliable.
Services were restarted, possibly because the connection between 
the Cisco Secure ACS and the AAA client is unstable. Clear the 
Single Connect TACACS+ AAA Client check box.