Good morning again, there is a second problem which keeps us from finishing new releases. Package `kernlab' defines a `fit' S4 generic and `modeltools' does as well (so this is kind of an internal communication problem). `party' and `kernlab' define methods for `fit' and export them in their namespaces. Now, when I attach `party' I get R> library("party") R> getMethods(fit) model = "StatModel", data = "ModelEnv": structure(function (model, data, ...) model at fit(data, ...), class = structure("MethodDefinition", package = "methods"), target = structure(c("StatModel", "ModelEnv"), .Names = c("model", "data"), class = structure("signature", package = "methods")), defined = structure(c("StatModel", "ModelEnv"), .Names = c("model", "data"), class = structure("signature", package = "methods"))) model = "StatModel", data = "LearningSample": structure(function (model, data, ...) model at fit(data, ...), class = structure("MethodDefinition", package = "methods"), target = structure(c("StatModel", "LearningSample"), .Names = c("model", "data"), class = structure("signature", package = "methods")), defined = structure(c("StatModel", "LearningSample"), .Names = c("model", "data"), class = structure("signature", package = "methods"))) Now, when I additionally attach `kernlab', only the `kernlab' definitions remain active R> getMethods(fit) object = "ksvm": structure(function (object) object at fit, class = structure("MethodDefinition", package = "methods"), target = structure("ksvm", .Names = "object", class = structure("signature", package = "methods")), defined = structure("ksvm", .Names = "object", class = structure("signature", package = "methods"))) object = "gausspr": structure(function (object) object at fit, class = structure("MethodDefinition", package = "methods"), target = structure("gausspr", .Names = "object", class = structure("signature", package = "methods")), defined = structure("gausspr", .Names = "object", class = structure("signature", package = "methods"))) object = "rvm": structure(function (object) object at fit, class = structure("MethodDefinition", package = "methods"), target = structure("rvm", .Names = "object", class = structure("signature", package = "methods")), defined = structure("rvm", .Names = "object", class = structure("signature", package = "methods"))) object = "onlearn": structure(function (object) object at fit, class = structure("MethodDefinition", package = "methods"), target = structure("onlearn", .Names = "object", class = structure("signature", package = "methods")), defined = structure("onlearn", .Names = "object", class = structure("signature", package = "methods"))) and the `party' is over. Is there anything (except agreeing on a common signature) one can do about it? Best wishes, Torsten