Hi, I'm running R 2.9.0 on OS X Tiger (10.5.8). When I use rJava I see that it is using the 1.5.0 JRE. When I tried to reconfigure R to use the 1.6 JDK that I have installed, I did sudo R CMD javareconf and I get Java interpreter : /usr/bin/java Java version : 1.5.0_16 Java home path : /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home Java compiler : /usr/bin/javac Java headers gen.: /usr/bin/javah Java archive tool: /usr/bin/jar Java library path: JNI linker flags : -framework JavaVM JNI cpp flags : -I$(JAVA_HOME)/include Updating Java configuration in /Library/Frameworks/R.framework/Resources sed: -e: No such file or directory sed: s|JAVA_CPPFLAGS =.\{0,\}|JAVA_CPPFLAGS -I$(JAVA_HOME)/include|g: No such file or directory sed: -e: No such file or directory sed: s|JAVA_CPPFLAGS =.\{0,\}|JAVA_CPPFLAGS -I$(JAVA_HOME)/include|g: No such file or directory Done. While it is looking at /usr/bin/java, when I manually run /usr/bin/java -version I get java version "1.6.0_07" Java(TM) SE Runtime Environment (build 1.6.0_07-b06-153) Java HotSpot(TM) 64-Bit Server VM (build 1.6.0_07-b06-57, mixed mode) How could I get R to use the 1.6 JDK rather than the 1.5 JDK? Thanks -- Rajarshi Guha NIH Chemical Genomics Center