Gentlemen: I have a second issue. I need to use swig version 1.3.22 and my FC3 system has 1.3.21, just one version behind. Using "yum upgrade" or "yum update" doesnt update swig. Is there any "yum" method to get swig version 1.3.22 into my FC3 system? By the way, all of this is in preparation for compiling the new gnuradio software for the SDR (Software Defined Radio) whose new USRP hardware is just being released. Charles