Dear R users, I would like to use RCytoscape to plot networks. I downloaded and installed Cytoscape (and the plug in CytoscapeRPC) and the library RCytoscape. At the same time I downloaded the XMLRPC and unzipped it. The problem is, when running the example reported on the RCytoscape package pdf, that is: library(RCytoscape) g <- new ('graphNEL', edgemode='directed') g <- graph::addNode ('A', g) g <- graph::addNode ('B', g) g <- graph::addNode ('C', g) cw <- new.CytoscapeWindow ('vignette', graph=g) after cw the following error message appears: Error in function (type, msg, asError = TRUE) : couldn't connect to host. Can anyone help me please? Thanks in advance, Eleonora Lusito -- Eleonora Lusito Computational Biology PhD student Molecular Medicine Program via Ripamonti 435, 20141 Milano, Italy Phone number: +390294375160 e-mail: eleonora.lusito at ifom-ieo-campus.it