On Feb 24, 2014, at 18:59, John R Pierce <pierce at hogranch.com> wrote: > how did you do these installs? I've never had trouble doing it via > yum, like: yum install glibc.i686 That's exactly what I did, and it worked fine (I can compile our 32-bit apps), but I get the error when I try to do the "yum update". > but then, I've only done this on centos 6 So have I. I only mentioned CentOS 7 because it was supposed to be 64-bit only (but now it seems that the CentOS team is working on an i686 release for CentOS 7). Alfred