Dear Bioconductor mailing group,

I have been trying to get the topGO graph visualization tools to work on my
Windows 7 PC with R 2.13.2 installed, but I've been encountering a crippling
crash.
Just as a little bit of background, I have Rgraphviz_1.30.1 installed in R
and Graphviz 2.20.3.1 installed for my PC (the bin folder is declared in the
Environmental Path variable as 'C:\Program Files (x86)\Graphviz2.20\bin').
Loading Rgraphviz in the library works fine (so does example(Layout) after
loading), but whenever I try to use a topGO function calling something from
Rgraphviz (such as showSigOfNodes() ), R crashes immediately with no error
message.  The problem occurs even with the example data in the topGO
package:

   library(topGO)
>    library(Rgraphviz)
>    data(GOdata)
>    data(results.tGO)
>    showSigOfNodes(GOdata, score(resultFisher), firstSigNodes = 5, useInfo =
> 'all') #Crashes
>    printGraph(GOdata, resultFisher, firstSigNodes = 5, fn.prefix =
> "sampleFile", useInfo = "all", pdfSW = TRUE) #Crashes


I have tried all advice that I have seen in older responses (installing
visual c++ redistribution package, trying older and newer versions of
graphviz, uninstalling and re-installing R and graphviz, updating packages),
but nothing seems to work.  If anyone has any suggestions on how to fix this
crash, it would be very much appreciated!

Thanks and all the best,
Joseph Skaf

> sessionInfo()
R version 2.13.2 (2011-09-30)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252

attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets  methods
[8] base

other attached packages:
[1] Rgraphviz_1.30.1     topGO_2.4.0          SparseM_0.89
[4] GO.db_2.5.0          RSQLite_0.10.0       DBI_0.2-5
[7] AnnotationDbi_1.14.1 Biobase_2.12.2       graph_1.30.0

loaded via a namespace (and not attached):
[1] lattice_0.19-33 tools_2.13.2

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