I am testing the upgrade of a D6 site to D7. The D6 site was probable installed using acquila - and thus having profile name of acquila. As I have not installed/used acquila on the D7 site, the acquila profile is not available.
I debugged the process and could see in install.inc
but acquila was not enabled neither as a profile or as a module. So, I played with the variable table and deleted the 'installed_profile' variable - the default is ' standard' -- but standard was not enabled as a profile.



