Network Analyzer Beta install issues

[snapon_admin]

I know it's not officially supported as it's a beta currently, but I was hoping someone here may have a bit of guidance for me regarding the installation issues I'm currently facing. When I run the install script I'm having all of the URLs 404 on me and it results in this error:

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Error Downloading Packages:
  python-2.6.6-29.el6_3.3.x86_64: failure: Packages/python-2.6.6-29.el6_3.3.x86_64.rpm from updates: [Errno 256] No more mirrors to try.
  byacc-1.9.20070509-7.el6.x86_64: failure: Packages/byacc-1.9.20070509-7.el6.x86_64.rpm from base: [Errno 256] No more mirrors to try.
  glibc-common-2.12-1.80.el6_3.6.x86_64: failure: Packages/glibc-common-2.12-1.80.el6_3.6.x86_64.rpm from updates: [Errno 256] No more mirrors to try.
  glibc-2.12-1.80.el6_3.6.x86_64: failure: Packages/glibc-2.12-1.80.el6_3.6.x86_64.rpm from updates: [Errno 256] No more mirrors to try.
  glibc-devel-2.12-1.80.el6_3.6.x86_64: failure: Packages/glibc-devel-2.12-1.80.el6_3.6.x86_64.rpm from updates: [Errno 256] No more mirrors to try.
  sendmail-8.14.4-8.el6.x86_64: failure: Packages/sendmail-8.14.4-8.el6.x86_64.rpm from base: [Errno 256] No more mirrors to try.
  python-libs-2.6.6-29.el6_3.3.x86_64: failure: Packages/python-libs-2.6.6-29.el6_3.3.x86_64.rpm from updates: [Errno 256] No more mirrors to try.
  bison-2.4.1-5.el6.x86_64: failure: Packages/bison-2.4.1-5.el6.x86_64.rpm from base: [Errno 256] No more mirrors to try.
  mod_wsgi-3.2-1.el6.x86_64: failure: Packages/mod_wsgi-3.2-1.el6.x86_64.rpm from base: [Errno 256] No more mirrors to try.
  python-devel-2.6.6-29.el6_3.3.x86_64: failure: Packages/python-devel-2.6.6-29.el6_3.3.x86_64.rpm from updates: [Errno 256] No more mirrors to try.
  flex-2.5.35-8.el6.x86_64: failure: Packages/flex-2.5.35-8.el6.x86_64.rpm from base: [Errno 256] No more mirrors to try.
  hesiod-3.1.0-19.el6.x86_64: failure: Packages/hesiod-3.1.0-19.el6.x86_64.rpm from base: [Errno 256] No more mirrors to try.
  procmail-3.22-25.1.el6.x86_64: failure: Packages/procmail-3.22-25.1.el6.x86_64.rpm from base: [Errno 256] No more mirrors to try.
  glibc-headers-2.12-1.80.el6_3.6.x86_64: failure: Packages/glibc-headers-2.12-1.80.el6_3.6.x86_64.rpm from updates: [Errno 256] No more mirrors to try.

gcc-4.4.6-4.el6.x86_64
package flex is not installed
**** IRRECOVERABLE ERROR ****
=========================================
Yum did not properly install the necessary dependencies. Dep that failed: flex
=========================================
**** INSTALLER DID NOT SUCCESSFULLY FINISH ****

Any advice on how I might be able to sort this out?

[lmiltchev]

What happens when you run the following commands?

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yum clean all
yum update

Any errors?

[snapon_admin]

Awesome! That got it, thanks.