diff --git a/src/mod_converter/mod_converter.cpp b/src/mod_converter/mod_converter.cpp
index 4771b5e..51a14d6 100644
--- a/src/mod_converter/mod_converter.cpp
+++ b/src/mod_converter/mod_converter.cpp
@@ -112,7 +112,7 @@ int main(int argc, char *argv[])
         }
     }
     else
-        throw std::runtime_error("Bad fs object");
+        throw std::runtime_error("No such file or directory: " + normalize_path(p));
 
     if (stats)
     {
diff --git a/src/model/model.cpp b/src/model/model.cpp
index d4265d8..ea3165d 100644
--- a/src/model/model.cpp
+++ b/src/model/model.cpp
@@ -93,9 +93,9 @@ enum AxisSystem
     UE4 = AIM, // Do not use 'Convert scene' during UE4 import!
 
     ax_aim = AIM,
-    ax_ue4,
+    ax_ue4 = ax_aim,
     ax_maya_y = MayaYUpZFrontRH,
-    ax_win_3d_viewer,
+    ax_win_3d_viewer = ax_maya_y,
 };
 
 cl::opt<AxisSystem> AS(cl::desc("Choose axis system:"),