[Haskell-cafe] Automated Differentiation of Matrices (hmatrix)

[Brandon Allbery]

On Wed, Apr 10, 2013 at 12:39 PM, Dominic Steinitz <dominic at steinitz.org>wrote:

> <interactive>:1:6:
>     Could not deduce (repa-3.2.3.1:Data.Array.Repa.Eval.Elt.Elt
>                         (ad-3.4:Numeric.AD.Internal.Types.AD s a))
>
> DANGER WILL ROBINSON!

It's showing package names+versions on the types; this usually means you
have multiple versions of those packages installed, and ghc / ghci is
confused as to which one to use.

-- 
brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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