diff -r fe98058bad3f src/bspeval.cc
--- a/src/bspeval.cc	Thu Nov 29 14:41:12 2018 +0100
+++ b/src/bspeval.cc	Sat Dec 29 18:42:18 2018 +0100
@@ -113,7 +113,7 @@
       error("bspeval: the knot vector should be a real vector."); 
       return true; 
     } 
-  if (!args(3).is_real_type()) 
+  if (!args(3).isreal ()) 
     { 
       error("bspeval: the set of parametric points should be an array of doubles."); 
       return true; 
diff -r fe98058bad3f src/nrb_srf_basisfun__.cc
--- a/src/nrb_srf_basisfun__.cc	Thu Nov 29 14:41:12 2018 +0100
+++ b/src/nrb_srf_basisfun__.cc	Sat Dec 29 18:42:18 2018 +0100
@@ -66,7 +66,7 @@
 	} // spu  =  findspan (m, p, u, U); 
 
       newargs(3) = U; newargs(2) = p; newargs(1) = u; newargs(0) = spu;
-      Matrix Ik = feval (std::string("numbasisfun"), newargs, 1)(0).matrix_value (); // Ik = numbasisfun (spu, u, p, U);
+      Matrix Ik = octave::feval (std::string("numbasisfun"), newargs, 1)(0).matrix_value (); // Ik = numbasisfun (spu, u, p, U);
 
       RowVector spv(v);
       for (octave_idx_type ii(0); ii < v.numel (); ii++)
@@ -75,7 +75,7 @@
 	} // spv  =  findspan (n, q, v, V);
 
       newargs(3) = V; newargs(2) = q; newargs(1) = v; newargs(0) = spv;
-      Matrix Jk = feval (std::string("numbasisfun"), newargs, 1)(0).matrix_value (); // Jk = numbasisfun (spv, v, q, V);
+      Matrix Jk = octave::feval (std::string("numbasisfun"), newargs, 1)(0).matrix_value (); // Jk = numbasisfun (spv, v, q, V);
 
       Matrix NuIkuk(npt, p+1, 0.0);
       for (octave_idx_type ii(0); ii < npt; ii++)
diff -r fe98058bad3f src/nrb_srf_basisfun_der__.cc
--- a/src/nrb_srf_basisfun_der__.cc	Thu Nov 29 14:41:12 2018 +0100
+++ b/src/nrb_srf_basisfun_der__.cc	Sat Dec 29 18:42:18 2018 +0100
@@ -73,7 +73,7 @@
 	} // spu  =  findspan (m, p, u, U); 
 
       newargs(3) = U; newargs(2) = p; newargs(1) = u; newargs(0) = spu;
-      Matrix Ik = feval (std::string("numbasisfun"), newargs, 1)(0).matrix_value (); // Ik = numbasisfun (spu, u, p, U);
+      Matrix Ik = octave::feval (std::string("numbasisfun"), newargs, 1)(0).matrix_value (); // Ik = numbasisfun (spu, u, p, U);
 
       RowVector spv(v);
       for (octave_idx_type ii(0); ii < v.numel (); ii++)
@@ -82,7 +82,7 @@
 	} // spv  =  findspan (n, q, v, V);
 
       newargs(3) = V; newargs(2) = q; newargs(1) = v; newargs(0) = spv;
-      Matrix Jk = feval (std::string("numbasisfun"), newargs, 1)(0).matrix_value (); // Jk = numbasisfun (spv, v, q, V);
+      Matrix Jk = octave::feval (std::string("numbasisfun"), newargs, 1)(0).matrix_value (); // Jk = numbasisfun (spv, v, q, V);
 
       Matrix NuIkuk(npt, p+1, 0.0);
       for (octave_idx_type ii(0); ii < npt; ii++)
@@ -100,11 +100,11 @@
 
      
       newargs(4) = 1; newargs(3) = U; newargs(2) = u; newargs(1) = p; newargs(0) = spu;
-      NDArray NuIkukprime = feval (std::string("basisfunder"), newargs, 1)(0).array_value (); //   NuIkukprime = basisfunder (spu, p, u, U, 1);
+      NDArray NuIkukprime = octave::feval (std::string("basisfunder"), newargs, 1)(0).array_value (); //   NuIkukprime = basisfunder (spu, p, u, U, 1);
                                                                                               //   NuIkukprime = squeeze(NuJkukprime(:,2,:));
       
       newargs(4) = 1; newargs(3) = V; newargs(2) = v; newargs(1) = q; newargs(0) = spv;
-      NDArray NvJkvkprime = feval (std::string("basisfunder"), newargs, 1)(0).array_value (); //   NvJkvkprime = basisfunder (spv, q, v, V, 1);
+      NDArray NvJkvkprime = octave::feval (std::string("basisfunder"), newargs, 1)(0).array_value (); //   NvJkvkprime = basisfunder (spv, q, v, V, 1);
                                                                                               //   NvJkvkprime = squeeze(NvJkvkprime(:,2,:));
       
       for (octave_idx_type k(0); k < npt; k++) 
diff -r fe98058bad3f src/tbasisfun.cc
--- a/src/tbasisfun.cc	Thu Nov 29 14:41:12 2018 +0100
+++ b/src/tbasisfun.cc	Sat Dec 29 18:42:18 2018 +0100
@@ -156,7 +156,7 @@
   RowVector N(u.cols ());
   double *Nptr = N.fortran_vec ();
 
-  if (! args(2).is_cell ())
+  if (! args(2).iscell ())
     {
 
       double p = args(1).idx_type_value ();
