diff --git a/Cantera/clib/src/ctonedim.cpp b/Cantera/clib/src/ctonedim.cpp
index 2a968b9ce..5a4ef20e6 100644
--- a/Cantera/clib/src/ctonedim.cpp
+++ b/Cantera/clib/src/ctonedim.cpp
@@ -622,4 +622,26 @@ extern "C" {
         catch (CanteraError) { return -1; }
     }
 
+    int DLL_EXPORT sim1D_evalSSJacobian(int i) {
+        try {
+            _sim1D(i)->evalSSJacobian();
+            return 0;
+        }
+        catch (CanteraError) { return -1; }
+    }
+
+    double DLL_EXPORT sim1D_jacobian(int i, int m, int n) {
+        try {
+            return _sim1D(i)->jacobian(m,n);
+        }
+        catch (CanteraError) { return DERR; }
+    }
+
+    int DLL_EXPORT sim1D_size(int i) {
+        try {
+            return _sim1D(i)->size();
+        }
+        catch (CanteraError) { return -1; }
+    }
+
 }
diff --git a/Cantera/clib/src/ctonedim.h b/Cantera/clib/src/ctonedim.h
index c5e1521b5..9ae2ed638 100644
--- a/Cantera/clib/src/ctonedim.h
+++ b/Cantera/clib/src/ctonedim.h
@@ -81,6 +81,9 @@ extern "C" {
     int DLL_IMPORT sim1D_timeStepFactor(int i, double tfactor);
     int DLL_IMPORT sim1D_setTimeStepLimits(int i, double tsmin, double tsmax);
     int DLL_IMPORT sim1D_setFixedTemperature(int i, double temp);
+    int DLL_IMPORT sim1D_evalSSJacobian(int i);
+    double DLL_IMPORT sim1D_jacobian(int i, int m, int n);
+    int DLL_IMPORT sim1D_size(int i);
 }
 
 
diff --git a/Cantera/src/oneD/MultiJac.cpp b/Cantera/src/oneD/MultiJac.cpp
index ddb275c78..9f8c25973 100644
--- a/Cantera/src/oneD/MultiJac.cpp
+++ b/Cantera/src/oneD/MultiJac.cpp
@@ -94,12 +94,6 @@ namespace Cantera {
                         for (m = 0; m < mv; m++) {
                             value(m+iloc,ipt) = (m_r1[m+iloc] 
                                 - resid0[m+iloc])*rdx;
-                            //if (__isnand(value(m+iloc,ipt))) {
-                            //    cout << "NaN detected at i, j, n, m: " << i 
-                            //         << " " << j << " " << n << " " <<  m << 
-                            //        " " << m_r1[m+iloc] << " " << resid0[m+iloc]
-                            //         << " " << rdx << endl;
-                            //}
                         }
                     }
                 }
diff --git a/Cantera/src/oneD/OneDim.cpp b/Cantera/src/oneD/OneDim.cpp
index d2df70c2b..31deb1504 100644
--- a/Cantera/src/oneD/OneDim.cpp
+++ b/Cantera/src/oneD/OneDim.cpp
@@ -209,6 +209,15 @@ namespace Cantera {
         return m;
     }
 
+    void OneDim::evalSSJacobian(doublereal* x, doublereal* xnew) {
+        doublereal rdt_save = m_rdt;
+        m_jac_ok = false;
+        setSteadyMode();
+        eval(-1, x, xnew, 0.0, 0);
+        m_jac->eval(x, xnew, 0.0);
+        m_rdt = rdt_save;
+    }
+
     /**
      * Return a pointer to the domain that contains component i of the
      * global solution vector. The domains are scanned right-to-left,
diff --git a/Cantera/src/oneD/OneDim.h b/Cantera/src/oneD/OneDim.h
index 6bff3256f..f252a5b0b 100644
--- a/Cantera/src/oneD/OneDim.h
+++ b/Cantera/src/oneD/OneDim.h
@@ -156,6 +156,8 @@ namespace Cantera {
 
     protected:
 
+        void evalSSJacobian(doublereal* x, doublereal* xnew);
+
         doublereal m_tmin;        // minimum timestep size
         doublereal m_tmax;        // maximum timestep size
         doublereal m_tfactor;     // factor time step is multiplied by
diff --git a/Cantera/src/oneD/Sim1D.cpp b/Cantera/src/oneD/Sim1D.cpp
index ed1f768c2..b1e9bc8fd 100644
--- a/Cantera/src/oneD/Sim1D.cpp
+++ b/Cantera/src/oneD/Sim1D.cpp
@@ -9,6 +9,7 @@
  */
 
 #include "Sim1D.h"
+#include "MultiJac.h"
 
 namespace Cantera {
 
@@ -566,4 +567,12 @@ namespace Cantera {
             }                    
         }
     }            
+
+    doublereal Sim1D::jacobian(int i, int j) { 
+        return OneDim::jacobian().value(i,j);
+    }
+
+    void Sim1D::evalSSJacobian() {
+        OneDim::evalSSJacobian(DATA_PTR(m_x), DATA_PTR(m_xnew));
+    }
 }
diff --git a/Cantera/src/oneD/Sim1D.h b/Cantera/src/oneD/Sim1D.h
index afe34bc1d..28c59e061 100644
--- a/Cantera/src/oneD/Sim1D.h
+++ b/Cantera/src/oneD/Sim1D.h
@@ -109,6 +109,10 @@ namespace Cantera {
 
         const doublereal* solution() const { return DATA_PTR(m_x); }
 
+        doublereal jacobian(int i, int j);
+
+        void evalSSJacobian();
+
     protected:
 
         vector_fp m_x;          // the solution vector