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I'm trying to load the Feynarts package into Windows environment to use with Mathematica. First I loaded Cygwin and than ran the Feynarts install file in the Cygwin folder. Then I realized that it has to be in Mathematica folder, so I moved all the files into C:\Program Files\Wolfram Research\Mathematica\4.2 (1)\SystemFiles\Kernel\SystemResources\Windows I'm not sure I placed it in the right place but when I load the package from Mathematica with

<<FeynArts`

it give me Null in output

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Might be the same problem as here. I'm not sure if it still supports mma v4.2 though... Please try the updated version in Frederik's answer. In any case, both Rolf and Frederik are active here and will probably answer your question soon. – rm -rf♦ Nov 18 '12 at 20:26
Welcome to Mathematica.SE! Please consider registering your account so that any upvotes you get on this question are added to those you might get on future questions and answers. That way, over time you will be able to do more on the site (post graphics, edit things, etc). – Sjoerd C. de Vries Nov 18 '12 at 21:40
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I noted that you used a straight quote in the Get command above. I changed that to the correct backtick "`" quote. Perhaps you made the same error inside Mathematica? – Sjoerd C. de Vries Nov 18 '12 at 21:44
Thanks for the help i changed the back tics as u suggsted and now it say error loading! any other thought? thx Ezra – ezra kohavi Nov 19 '12 at 14:21
What does Names["FeynArts`*"] give? Also,if possible, try to use a newer Mathematica version. Finally, check out feynarts.de and contact Thomas Hahn, the current maintainer of FeynArts. – Rolf Mertig Nov 19 '12 at 14:41
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