Hi everybody I am trying to install RJSONIO from source in on Mac OS X 10.5.8. I used the Package Installer. The message and sessionInfo is attached below Can someone help me to understand the error message and maybe give hint towards solving the problem thanks in advance Christiaan Message: The downloaded packages are in ‘/private/var/folders/ub/ubvWLUkKHf8WAywv5rmtcE+++TI/-Tmp-/RtmpZflYon/downloaded_packages’ * installing *source* package ‘RJSONIO’ ... ** libs *** arch - i386 gcc -arch i386 -std=gnu99 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/i386 -I/usr/local/include -fPIC -g -O2 -c ConvertUTF.c -o ConvertUTF.o i686-apple-darwin9-gcc-4.0.1: installation problem, cannot exec 'as': No such file or directory make: *** [ConvertUTF.o] Error 1 ERROR: compilation failed for package ‘RJSONIO’ * removing ‘/Library/Frameworks/R.framework/Versions/2.11/Resources/library/RJSONIO’ sessionInfo is R version 2.11.1 (2010-05-31) x86_64-apple-darwin9.8.0 locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base [[alternative HTML version deleted]]