Minor changes...test runs fine from here

SimPEG/Directives.py

@@ -272,6 +272,7 @@ class Update_IRLS(InversionDirective):
         self.reg.curModel = self.invProb.curModel
         self.reg.gamma = self.gamma
         
+        self.reg._W = None
         if getattr(self, 'phi_d_last', None) is None:
             self.phi_d_last = self.invProb.phi_d
 
@@ -288,6 +289,7 @@ class Update_IRLS(InversionDirective):
         # Get phi_m at the end of current iteration
         self.phi_m_last = self.invProb.phi_m_last
         
+        self.reg._W = None
          # Update the model used for the IRLS weights
         self.reg.curModel = self.invProb.curModel
 

SimPEG/Regularization.py

@@ -663,9 +663,8 @@ class Sparse(Simple):
             self.Rs = Utils.speye(self.regmesh.nC)
 
         else:
-            f_m = self.curModel - self.reg.mref
+            f_m = self.mapping * (self.curModel - self.reg.mref)
             self.rs = self.R(f_m , self.eps_p, self.norms[0])
-            #print "Min rs: " + str(np.max(self.rs)) + "Max rs: " + str(np.min(self.rs))
             self.Rs = Utils.sdiag( self.rs )
 
         return Utils.sdiag((self.regmesh.vol*self.alpha_s*self.gamma*self.wght)**0.5)*self.Rs
@@ -679,7 +678,7 @@ class Sparse(Simple):
             self.Rx = Utils.speye(self.regmesh.cellDiffxStencil.shape[0])
 
         else:
-            f_m = self.regmesh.cellDiffxStencil * self.curModel
+            f_m = self.regmesh.cellDiffxStencil * (self.mapping * self.curModel)
             self.rx = self.R( f_m , self.eps_q, self.norms[1])
             self.Rx = Utils.sdiag( self.rx )
 
@@ -693,7 +692,7 @@ class Sparse(Simple):
             self.Ry = Utils.speye(self.regmesh.cellDiffyStencil.shape[0])
 
         else:
-            f_m = self.regmesh.cellDiffyStencil * self.curModel
+            f_m = self.regmesh.cellDiffyStencil * (self.mapping * self.curModel)
             self.ry = self.R( f_m , self.eps_q, self.norms[2])
             self.Ry = Utils.sdiag( self.ry )
 
@@ -707,7 +706,7 @@ class Sparse(Simple):
             self.Rz = Utils.speye(self.regmesh.cellDiffzStencil.shape[0])
 
         else:
-            f_m = self.regmesh.cellDiffzStencil * self.curModel
+            f_m = self.regmesh.cellDiffzStencil * (self.mapping * self.curModel)
             self.rz = self.R( f_m , self.eps_q, self.norms[3])
             self.Rz = Utils.sdiag( self.rz )
 
@@ -729,6 +728,7 @@ class Sparse(Simple):
     def W(self):
         """Full regularization matrix W"""
         if getattr(self, '_W', None) is None:
+    
             wlist = (self.Wsmall, self.Wsmooth)
             self._W = sp.vstack(wlist)
         return self._W