Macaulay2/M2 — pull request #95 by luisgarciapuente (2014-02-13 05:06:27+00:00)
Title: New version fixes known bug in GraphicalModels.m2

In the current version of GraphicalModels, the following code would create an error

restart
loadPackage "GraphicalModels"
f = () -> (
R := gaussianRing G;
gaussianVanishingIdeal R)
G = graph({{a,b},{b,c},{c,d},{a,d}})
f()

In this version of GraphicalModels, Mike Stillman and Luis Garcia rewrote part of the code in gaussianRing, a few other methods to remove this bug. I am not sure if the certification must be commented out. I did commented out the certification in my local copy and the package was able to install, it passed all the tests and the bug has been squashed.