 effFunc=effBkg ] = 0.76916
      RooFormulaVar::effBkg[ actualVars=(pt,ab,mb,sb) formula="0.5*@1*(1+TMath::Erf((@0-@2)/@3))" ] = 0.76916
</pre>
</li>
<li> The workspace factory can now access all objects in the generic object store of the workspace, e.g.
<pre>
   TMatrixDSym* cov 
   RooWorkspace w("w") ;
   w.import(*cov,"cov") ;
   w.factory("MultiVarGaussian::mvg({x[-10,10],y[-10,10]},{3,5},cov)") ;
</pre></li>
<li> The workspace factory now correctly identifies and matches typedef-ed names in factory c