diff --git a/Hybrid/vtkTemporalInterpolator.cxx b/Hybrid/vtkTemporalInterpolator.cxx
index 8435bf9..472bf80 100644
--- a/Hybrid/vtkTemporalInterpolator.cxx
+++ b/Hybrid/vtkTemporalInterpolator.cxx
@@ -598,20 +598,26 @@ vtkDataSet *vtkTemporalInterpolator
         arrays.push_back(dataarray);
         }
       }
-    // do a quick check to see if all arrays have the same number of tuples
-    if (!this->VerifyArrays(&arrays[0], 2)) 
+    if (arrays[1])
       {
-      vtkWarningMacro(<<"Interpolation aborted for array " 
-        << (scalarname ? scalarname : "(unnamed array)") 
-        << " because the number of tuples/components"
-        << " in each time step are different");
+      // do a quick check to see if all arrays have the same number of tuples
+      if (!this->VerifyArrays(&arrays[0], 2)) 
+        {
+        vtkWarningMacro(<<"Interpolation aborted for array " 
+          << (scalarname ? scalarname : "(unnamed array)") 
+          << " because the number of tuples/components"
+          << " in each time step are different");
+        }
+      else
+        {
+        // allocate double for output if input is double - otherwise float
+        vtkDataArray *outarray = 
+          this->InterpolateDataArray(ratio, &arrays[0],
+                                     arrays[0]->GetNumberOfTuples());
+        output->GetPointData()->AddArray(outarray);
+        outarray->Delete();
+        }
       }
-    // allocate double for output if input is double - otherwise float
-    vtkDataArray *outarray = 
-      this->InterpolateDataArray(ratio, &arrays[0],
-                                 arrays[0]->GetNumberOfTuples());
-    output->GetPointData()->AddArray(outarray);
-    outarray->Delete();
     }
   //
   // Interpolate celldata if present
@@ -642,20 +648,26 @@ vtkDataSet *vtkTemporalInterpolator
         arrays.push_back(dataarray);
         }
       }
-    // do a quick check to see if all arrays have the same number of tuples
-    if (!this->VerifyArrays(&arrays[0], 2)) 
+    if (arrays[1])
       {
-      vtkWarningMacro(<<"Interpolation aborted for array " 
-                      << (scalarname ? scalarname : "(unnamed array)") 
-                      << " because the number of tuples/components"
-                      << " in each time step are different");
+      // do a quick check to see if all arrays have the same number of tuples
+      if (!this->VerifyArrays(&arrays[0], 2)) 
+        {
+        vtkWarningMacro(<<"Interpolation aborted for array " 
+                        << (scalarname ? scalarname : "(unnamed array)") 
+                        << " because the number of tuples/components"
+                        << " in each time step are different");
+        }
+      else
+        {
+        // allocate double for output if input is double - otherwise float
+        vtkDataArray *outarray = 
+          this->InterpolateDataArray(ratio, &arrays[0],
+                                     arrays[0]->GetNumberOfTuples());
+        output->GetCellData()->AddArray(outarray);
+        outarray->Delete();
+        }
       }
-    // allocate double for output if input is double - otherwise float
-    vtkDataArray *outarray = 
-      this->InterpolateDataArray(ratio, &arrays[0],
-                                 arrays[0]->GetNumberOfTuples());
-    output->GetCellData()->AddArray(outarray);
-    outarray->Delete();
     }
   if (in1->GetInformation()->Has(vtkDataObject::DATA_GEOMETRY_UNMODIFIED()) &&
       in2->GetInformation()->Has(vtkDataObject::DATA_GEOMETRY_UNMODIFIED()))