Hello dear Haskell People! I'm currently very interested in doing some parallel programming in Haskell, specially in using the Data Parallel Haskell stuff...

So as a first step I tried to emulate the vector multiply example found in the Haskell Wiki:  http://www.haskell.org/haskellwiki/GHC/Data_Parallel_Haskell#A_simple_example

The code I've written (two files) for this example is in the following pastebins:

DPHVecMul.hs:  http://paste.org/pastebin/view/22899

Main.hs:  http://paste.org/pastebin/view/22900

I've compiled successfully both files and linked them, exactly as described in the Wiki. But when I run the resulting executable, the following error shows up:

"dotp: Prelude.undefined"

It's seems (from the tests I've done) that the call to the function fromPArrayP of the module Data.Parallel.Array.Prelude results always in undefined. In fact, I've taken a look at the function definition in the docs, and in fact it always returns undefined. It doesn't make ANY SENSE to me :P

Has someone been able to successfully compile and run this example code?? If so, what am I doing wrong? Is there some obvious error I'm incurring in? :D

Regards,

joaopizani@gmail.com

Computer Science - 2007/1

Federal University of Santa Catarina - Brazil