3dvolreg is part of AFNI but does not use OpenMP. Some of the OpenMP enabled programs that you might check are: 3dAllineate, 3dREMLfit, and 3dClustSim.
The errors you are getting are interesting. Can you tell us more about your system setup? Do you have fink, MacPorts, or Homebrew installed? What's your system path setup?
Edited 2 time(s). Last edit at 11/06/2012 04:35PM by Peter Molfese.
