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Webench lock up

I tried a simple design in Webench:

Vin of 7.0 to 14.0 V

Vout of 3.3V

Iout of 5.0A

Ambient 30A

Then I click Start Design.

Webench does the Initialization, then does 'Calculating' while displaying a moving circle of lines. It stays here forever. I've used these parameters in the past, so something has changed with Webench.

If I do the default that the program starts with of:

Vin of 14 to 22 V

Vout of 3.3V

Iout of 2.0A, it works (of course if these parameters didn't work, you guys would probably have noticed by now).

I suppose I could do a trial-and-error to figure out which parameter is causing the software to choke, but I was hoping you guys could figure it out and fix it.