Up grade of agents from SCSP 5.2.x to DCS 6.X is blocked by system policy.
MSI (s) (E4:40) [15:24:12:230]: Windows Installer reconfigured the product.
Product Name: Symantec Data Center Security Server Manager. Product Version:
Windows Installer popup states: "The system administrator has set policies to prevent this installation."
By removing the UAC disable browse and the tomcat only registry setting we have completely resolved this issue.
Security\Manager\TomcatONLYInstall registry key and re-run the upgrade