I've run into the same problem on Windows XP: A .aip file that used to work is now producing installers that fail at the last step, with the message "[name of my product] setup ended prematurely because of an error. Your system has not been modified. To install this program at a later time, please run the installation again."
A Run and Log produces the following:
MSI (s) (78:6C): MainEngineThread is returning 1603
MSI (c) (A4:E0): Back from server. Return value: 1603
MSI (c) (A4:E0): Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied. Counter after decrement: -1
Action ended 15:51:21: ExecuteAction. Return value 3.
MSI (c) (A4:E0): Doing action: FatalError
Action start 15:51:21: FatalError.
DEBUG: Error 2826: Control BottomLine on dialog FatalError extends beyond the boundaries of the dialog to the right by 5 pixels
The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2826. The arguments are: FatalError, BottomLine, to the right
Action 15:51:22: FatalError. Dialog created
I can provide the .aip file if it helps.
Cheers,
Tony