[CentOS] yumex errs out on startup

greetings.

on tower box, yumex errs out on startup with error message;

  Error in repository setup

  Cannot find a valid baseurl for repo: base

  You can try starting 'yumex -n' from a command line
  and deselecting the repositories causing problems
  and try again.

file CentOS-Base.repo is line for line same on both tower box and
laptop. no problems on laptop.

what might be causing err?

tia.


-- 

The important thing is not to stop questioning.
 - Albert Einstein


CentOS GNU/Linux 6.8
KDE 4.3.4

peace out.

tc,hago.

g
.

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