Well, To be honest, part of the problem is that I work in about four different Python environments!! I've had a hard time getting the scipy suite to work fully on windows, and for number crunching it's just easier to run in linux. This here was just a cut from running a script I wrote at the DOS prompt... but that is not my usual flavor.
Anyway, the problem was in fact a shape mismatch. Ha! Imagine that ;) Thanks for the feedback. The issue was in the dividing by A, I had to pull that out separately and things worked. Thanks!
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