hello everyone: I want to use SSOAP package to do some web service of EMBL-EBI such as 'emboss needle'. library(SSOAP) library(XML) library(RCurl) # wsdl <- getURL("http://www.ebi.ac.uk/Tools/services/soap/emboss_needle?wsdl", ssl.verifypeer = FALSE) doc <- xmlInternalTreeParse(wsdl) def <- processWSDL(doc) ff <- genSOAPClientInterface(def = def) #to get all parameters ff at functions$getParameters() ###it does really work # but how to get the parameter details? I try: ff at functions$getParameterDetails(parameterId="asequence") and error message as follow: Error in as(list(parameterId = parameterId), "string") : no method or default for coercing "list" to "string" and i use the action of 'run' to do web service of 'emboss neddle' using: ###following were parameters: email='luzifer.li at gmail.com' title='just_for_try' myp<-new("InputParameters") myp at matrix='BLOSUM62' myp at gapopen=10 myp at gapext=0.5 myp at endweight=FALSE myp at endopen=10 myp at endextend=0.5 myp at format='pair' myp at stype='protein' myp at asequence<-"HEIAKGKAL" myp at bsequence<-"HEIAKGKALIIIIEALKCLA" ####and use 'run' to do the web service: ff at functions$run(email='luzifer.li at gmail.com',title='just_for_try',parameters=myp,.opts = list(ssl.verifypeer = FALSE)) and error message: Error in function (classes, fdef, mtable) : unable to find an inherited method for function "toSOAP", for signature "InputParameters", "XMLInternalElementNode", "missing" Does anyone know why the above codes didn't work? Or anyone know someway to do web service of EMBL-EBI such as 'emboss needle'? Thanks! Gang -- output of sessionInfo(): R version 2.15.1 (2012-06-22) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=Chinese_People's Republic of China.936 LC_CTYPE=Chinese_People's Republic of China.936 LC_MONETARY=Chinese_People's Republic of China.936 [4] LC_NUMERIC=C LC_TIME=Chinese_People's Republic of China.936 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] XMLSchema_0.8-0 XML_3.9-4.1 SSOAP_0.91-0 RCurl_1.91-1.1 bitops_1.0-4.1 Biostrings_2.24.1 IRanges_1.14.4 BiocGenerics_0.2.0 loaded via a namespace (and not attached): [1] codetools_0.2-8 stats4_2.15.1 tools_2.15.1 -- Sent via the guest posting facility at bioconductor.org.