Hi Rainer, Looking at your sessionInfo() it looks like you are using 32-bit R on 64-bit Windows 7. My guess is that the installed JVM is 64-bit. This leads to an architecture clash between R and Java. It is important to make sure that the architectures of R and the JVM match, i.e. either both are 32-bit or both are 64-bit. Can you verify if this is the case? Run "java -version" on the command line to see whether you are using a 32-bit or 64-bit JVM.
Regards, Martin -- View this message in context: http://r.789695.n4.nabble.com/Java-problem-XLConnect-xlsx-package-tp4631304p4631365.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.