[WB 2013.09.01] "No project is defined for building"

Oops:  "[INVALID] No project is defined for building". 
 
That's after "install win7pe", both before and after "config win7pe", when I type "auto".  And that error string completely fails google.  What's it unhappy about, folks?

16:08:37 [COMMAND] SOURCE C:\Users\PD\Desktop\WinBuilder\source\win7sp1
16:08:37 [ACCEPTED] Defined source as Windows 7 Ultimate 32 bit en-US 6.1.7601.17514 with SP1 at location C:\Users\PD\Desktop\WinBuilder\source\win7sp1
16:08:37 [INFO] You can start the build right now if you wish. Just type "build" to get started
16:08:44 [COMMAND] build
16:08:44 [INVALID] No project is defined for building

AUTO doesn't work either.