A fix for the nightly test failure to free the stable pushes.  The new PMA  formulation was computing curvature corrections from the current data in the  surrogate model, and these curvature corrections were too inaccurate when a  nonlinear variable transformation induces additional curvature on top of a  low-order approximation.  For now, the curvature corrections for  approximation-based second-order PMA have been returned to using the most  recent truth evaluation data.  Testing is ongoing and some issues remain  near p=0.5; blessing of remaining DIFFS is still a ways off.
A fix for the nightly test failure to free the stable pushes.  The new PMA 
formulation was computing curvature corrections from the current data in the 
surrogate model, and these curvature corrections were too inaccurate when a 
nonlinear variable transformation induces additional curvature on top of a 
low-order approximation.  For now, the curvature corrections for 
approximation-based second-order PMA have been returned to using the most 
recent truth evaluation data.  Testing is ongoing and some issues remain 
near p=0.5; blessing of remaining DIFFS is still a ways off.


git-svn-id: dcef21d3ff4cbd8dced82702dcaad637bf246ecc@1126 aa0779c3-6ec2-4b84-a212-a405c134cd8d

pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA