i'm trying to install the rgraphviz package, which has been done successfully. but as i want to enter the command 'library(Rgraphviz)' i get a pop up box which indicates that libcdt-4.dll is not installed on the computer. i already tried to lower the version, so i installed 2.26 first, now i have version 2.20 installed. the file libcdt-4.dll is installed - it's in the bin folder of graphviz. so were's the problem?
my R version: 2.11.1
the error: Error : .onLoad in loadNamespace() fehlgechlagen, Details: Aufruf: Rgraphviz Fehler: value[[3L]](cond) Fehler: Laden von Paket/Namensraum für 'Rgraphviz' fehlgeschlagen