I updated to R 2.0.0. As I reinstalled the bioconductor packages I received an error message about a dependency that failed to install. The full text of the download/installation is listed below. As a novice user of both R and bioconductor, I need to understand the meaning of this type of failure and how to solve the problem. I appreciate any information and advice you may have about this type of error message. Thank you, John E. Cornell, Ph.D. Center for Epidemiology and Biostatistics University of Texas Health Science Center, San Antonio FULL TEXT FROM ATTEMPTED DOWNLOAD/INSTILATION: trying URL `http://www.bioconductor.org/bin/windows/contrib/2.0/PACKAGES' Content type `text/plain' length 46409 bytes opened URL downloaded 45Kb dependencies 'SSOAP''XML''NA' are not available also installing the dependencies 'Rgraphviz' trying URL `http://www.bioconductor.org/bin/windows/contrib/2.0/Rgraphviz_1.5.0.z ip' Content type `text/html' length unknown opened URL downloaded 1119 bytes trying URL `http://www.bioconductor.org/bin/windows/contrib/2.0/GeneTS_2.3.zip' Content type `application/zip' length 352822 bytes opened URL downloaded 344Kb trying URL `http://www.bioconductor.org/bin/windows/contrib/2.0/GeneTraffic_1.0.6 .zip' Content type `application/zip' length 222020 bytes opened URL downloaded 216Kb trying URL `http://www.bioconductor.org/bin/windows/contrib/2.0/GraphAT_1.0.0.zip ' Content type `application/zip' length 6135001 bytes opened URL downloaded 5991Kb trying URL `http://www.bioconductor.org/bin/windows/contrib/2.0/HEM_1.0.4.zip' Content type `application/zip' length 4020032 bytes opened URL downloaded 3925Kb Error in file(file, "r") : unable to open connection In addition: Warning messages: 1: error 1 in extracting from zip file 2: cannot open file `Rgraphviz/DESCRIPTION' [[alternative HTML version deleted]]

> I updated to R 2.0.0. As I reinstalled the bioconductor packages I received > an error message about a dependency that failed to install. The full text > of the download/installation is listed below. As a novice user of both R > and bioconductor, I need to understand the meaning of this type of failure > and how to solve the problem. I appreciate any information and advice you > may have about this type of error message. Can you also describe exactly how you invoked this installation attempt? It appears to be via 'install.packages' from base R? Also, it appears that you are using Windows, is this true? If so, I can tell you right off that your quest is in vain as Rgraphviz does not exist for Windows.