diff --git a/common/src/KokkosFFT_layouts.hpp b/common/src/KokkosFFT_layouts.hpp
index 4e474431..aea31d8c 100644
--- a/common/src/KokkosFFT_layouts.hpp
+++ b/common/src/KokkosFFT_layouts.hpp
@@ -46,7 +46,7 @@ auto get_extents(InViewType& in, OutViewType& out, axis_type<DIM> _axes) {
     // Then R2C
     if (is_complex<out_value_type>::value) {
       assert(out_extents.at(inner_most_axis) ==
-             in.extent(inner_most_axis) / 2 + 1);
+             in_extents.at(inner_most_axis) / 2 + 1);
     } else {
       throw std::runtime_error(
           "If the input type is real, the output type should be complex");
@@ -57,7 +57,7 @@ auto get_extents(InViewType& in, OutViewType& out, axis_type<DIM> _axes) {
     // Then C2R
     if (is_complex<in_value_type>::value) {
       assert(in_extents.at(inner_most_axis) ==
-             out.extent(inner_most_axis) / 2 + 1);
+             out_extents.at(inner_most_axis) / 2 + 1);
     } else {
       throw std::runtime_error(
           "If the output type is real, the input type should be complex");
@@ -95,7 +95,10 @@ auto get_extents_batched(InViewType& in, OutViewType& out,
                 "or equal to 1.");
 
   constexpr std::size_t rank = InViewType::rank;
-  int inner_most_axis        = rank - 1;
+  int inner_most_axis =
+      std::is_same_v<array_layout_type, typename Kokkos::LayoutLeft>
+          ? 0
+          : (rank - 1);
 
   std::vector<int> _in_extents, _out_extents, _fft_extents;
 
@@ -114,29 +117,11 @@ auto get_extents_batched(InViewType& in, OutViewType& out,
     _fft_extents.push_back(fft_extent);
   }
 
-  if (std::is_same<array_layout_type, Kokkos::LayoutLeft>::value) {
-    std::reverse(_in_extents.begin(), _in_extents.end());
-    std::reverse(_out_extents.begin(), _out_extents.end());
-    std::reverse(_fft_extents.begin(), _fft_extents.end());
-  }
-
-  // Define subvectors starting from last - DIM
-  // Dimensions relevant to FFTs
-  std::vector<int> in_extents(_in_extents.end() - DIM, _in_extents.end());
-  std::vector<int> out_extents(_out_extents.end() - DIM, _out_extents.end());
-  std::vector<int> fft_extents(_fft_extents.end() - DIM, _fft_extents.end());
-
-  int total_fft_size = std::accumulate(_fft_extents.begin(), _fft_extents.end(),
-                                       1, std::multiplies<>());
-  int fft_size = std::accumulate(fft_extents.begin(), fft_extents.end(), 1,
-                                 std::multiplies<>());
-  int howmany  = total_fft_size / fft_size;
-
   if (std::is_floating_point<in_value_type>::value) {
     // Then R2C
     if (is_complex<out_value_type>::value) {
-      assert(out_extents.at(inner_most_axis) ==
-             in.extent(inner_most_axis) / 2 + 1);
+      assert(_out_extents.at(inner_most_axis) ==
+             _in_extents.at(inner_most_axis) / 2 + 1);
     } else {
       throw std::runtime_error(
           "If the input type is real, the output type should be complex");
@@ -146,14 +131,32 @@ auto get_extents_batched(InViewType& in, OutViewType& out,
   if (std::is_floating_point<out_value_type>::value) {
     // Then C2R
     if (is_complex<in_value_type>::value) {
-      assert(in_extents.at(inner_most_axis) ==
-             out.extent(inner_most_axis) / 2 + 1);
+      assert(_in_extents.at(inner_most_axis) ==
+             _out_extents.at(inner_most_axis) / 2 + 1);
     } else {
       throw std::runtime_error(
           "If the output type is real, the input type should be complex");
     }
   }
 
+  if (std::is_same<array_layout_type, Kokkos::LayoutLeft>::value) {
+    std::reverse(_in_extents.begin(), _in_extents.end());
+    std::reverse(_out_extents.begin(), _out_extents.end());
+    std::reverse(_fft_extents.begin(), _fft_extents.end());
+  }
+
+  // Define subvectors starting from last - DIM
+  // Dimensions relevant to FFTs
+  std::vector<int> in_extents(_in_extents.end() - DIM, _in_extents.end());
+  std::vector<int> out_extents(_out_extents.end() - DIM, _out_extents.end());
+  std::vector<int> fft_extents(_fft_extents.end() - DIM, _fft_extents.end());
+
+  int total_fft_size = std::accumulate(_fft_extents.begin(), _fft_extents.end(),
+                                       1, std::multiplies<>());
+  int fft_size = std::accumulate(fft_extents.begin(), fft_extents.end(), 1,
+                                 std::multiplies<>());
+  int howmany  = total_fft_size / fft_size;
+
   return std::tuple<std::vector<int>, std::vector<int>, std::vector<int>, int>(
       {in_extents, out_extents, fft_extents, howmany});
 }
diff --git a/common/src/KokkosFFT_utils.hpp b/common/src/KokkosFFT_utils.hpp
index 40b43795..e80b0d3c 100644
--- a/common/src/KokkosFFT_utils.hpp
+++ b/common/src/KokkosFFT_utils.hpp
@@ -58,7 +58,7 @@ auto convert_negative_axis(const ViewType& view, int _axis = -1) {
   static_assert(Kokkos::is_view<ViewType>::value,
                 "convert_negative_axis: ViewType is not a Kokkos::View.");
   int rank = static_cast<int>(ViewType::rank());
-  assert(abs(_axis) < rank);  // axis should be in [-(rank-1), rank-1]
+  assert(_axis >= -rank && _axis < rank);  // axis should be in [-rank, rank-1]
   int axis = _axis < 0 ? rank + _axis : _axis;
   return axis;
 }
@@ -105,10 +105,9 @@ bool has_duplicate_values(const std::vector<T>& values) {
   return set_values.size() < values.size();
 }
 
-template <
-    typename IntType, std::size_t DIM = 1,
-    std::enable_if_t<std::is_integral_v<IntType>, std::nullptr_t> = nullptr>
-bool is_out_of_range_value_included(const std::array<IntType, DIM>& values,
+template <typename IntType, std::enable_if_t<std::is_integral_v<IntType>,
+                                             std::nullptr_t> = nullptr>
+bool is_out_of_range_value_included(const std::vector<IntType>& values,
                                     IntType max) {
   bool is_included = false;
   for (auto value : values) {
diff --git a/common/unit_test/Test_Utils.cpp b/common/unit_test/Test_Utils.cpp
index bef3d2b9..f44dff99 100644
--- a/common/unit_test/Test_Utils.cpp
+++ b/common/unit_test/Test_Utils.cpp
@@ -246,7 +246,7 @@ TEST(GetIndex, Vectors) {
 }
 
 TEST(IsOutOfRangeValueIncluded, Array) {
-  std::array<int, 4> v = {0, 1, 2, 3};
+  std::vector<int> v = {0, 1, 2, 3};
 
   EXPECT_TRUE(KokkosFFT::Impl::is_out_of_range_value_included(v, 2));
   EXPECT_TRUE(KokkosFFT::Impl::is_out_of_range_value_included(v, 3));
diff --git a/fft/CMakeLists.txt b/fft/CMakeLists.txt
index faf5524b..ffddf45b 100644
--- a/fft/CMakeLists.txt
+++ b/fft/CMakeLists.txt
@@ -1,4 +1,4 @@
 add_subdirectory(src)
 if(BUILD_TESTING)
     add_subdirectory(unit_test)
-endif()
+endif()
\ No newline at end of file