diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index a5e4623311..b043f38a77 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -710,10 +710,17 @@ if (COMPILER == "MSVC"):
         suffix = ""
         if os.path.isfile(GetThirdpartyDir() + "openexr/lib/IlmImf-2_2.lib"):
             suffix = "-2_2"
+        elif os.path.isfile(GetThirdpartyDir() + "openexr/lib/IlmImf-2_3.lib"):
+            suffix = "-2_3"
+        if os.path.isfile(GetThirdpartyDir() + "openexr/lib/IlmImf" + suffix + "_s.lib"):
+            suffix += "_s"
         LibName("OPENEXR", GetThirdpartyDir() + "openexr/lib/IlmImf" + suffix + ".lib")
         LibName("OPENEXR", GetThirdpartyDir() + "openexr/lib/IlmThread" + suffix + ".lib")
         LibName("OPENEXR", GetThirdpartyDir() + "openexr/lib/Iex" + suffix + ".lib")
-        LibName("OPENEXR", GetThirdpartyDir() + "openexr/lib/Half.lib")
+        if suffix == "-2_2":
+            LibName("OPENEXR", GetThirdpartyDir() + "openexr/lib/Half.lib")
+        else:
+            LibName("OPENEXR", GetThirdpartyDir() + "openexr/lib/Half" + suffix + ".lib")
         IncDirectory("OPENEXR", GetThirdpartyDir() + "openexr/include/OpenEXR")
     if (PkgSkip("JPEG")==0):     LibName("JPEG",     GetThirdpartyDir() + "jpeg/lib/jpeg-static.lib")
     if (PkgSkip("ZLIB")==0):     LibName("ZLIB",     GetThirdpartyDir() + "zlib/lib/zlibstatic.lib")
@@ -744,8 +751,7 @@ if (COMPILER == "MSVC"):
         IncDirectory("FCOLLADA", GetThirdpartyDir() + "fcollada/include/FCollada")
     if (PkgSkip("ASSIMP")==0):
         LibName("ASSIMP", GetThirdpartyDir() + "assimp/lib/assimp.lib")
-        path = GetThirdpartyDir() + "assimp/lib/IrrXML.lib"
-        if os.path.isfile(path):
+        if os.path.isfile(GetThirdpartyDir() + "assimp/lib/IrrXML.lib"):
             LibName("ASSIMP", GetThirdpartyDir() + "assimp/lib/IrrXML.lib")
         IncDirectory("ASSIMP", GetThirdpartyDir() + "assimp/include")
     if (PkgSkip("SQUISH")==0):
diff --git a/panda/src/windisplay/winGraphicsWindow.cxx b/panda/src/windisplay/winGraphicsWindow.cxx
index 40760ca1d9..195189ac9e 100644
--- a/panda/src/windisplay/winGraphicsWindow.cxx
+++ b/panda/src/windisplay/winGraphicsWindow.cxx
@@ -138,7 +138,7 @@ get_pointer(int device) const {
       double time = ClockObject::get_global_clock()->get_real_time();
       result._xpos = cpos.x;
       result._ypos = cpos.y;
-      ((GraphicsWindowInputDevice &)_input_devices[0]).set_pointer_in_window(result._xpos, result._ypos, time);
+      ((GraphicsWindowInputDevice *)_input_devices[0].p())->set_pointer_in_window(result._xpos, result._ypos, time);
     }
   }
   return result;
diff --git a/panda/src/x11display/x11GraphicsWindow.cxx b/panda/src/x11display/x11GraphicsWindow.cxx
index ef86c82166..caaacc4a9c 100644
--- a/panda/src/x11display/x11GraphicsWindow.cxx
+++ b/panda/src/x11display/x11GraphicsWindow.cxx
@@ -164,7 +164,7 @@ get_pointer(int device) const {
         double time = ClockObject::get_global_clock()->get_real_time();
         result._xpos = event.xbutton.x;
         result._ypos = event.xbutton.y;
-        ((GraphicsWindowInputDevice &)_input_devices[0]).set_pointer_in_window(result._xpos, result._ypos, time);
+        ((GraphicsWindowInputDevice *)_input_devices[0].p())->set_pointer_in_window(result._xpos, result._ypos, time);
       }
       x11GraphicsPipe::_x_mutex.release();
     }
diff --git a/pandatool/src/mayaegg/mayaEggLoader.cxx b/pandatool/src/mayaegg/mayaEggLoader.cxx
index 68fcb8d0f7..a60e5d2372 100644
--- a/pandatool/src/mayaegg/mayaEggLoader.cxx
+++ b/pandatool/src/mayaegg/mayaEggLoader.cxx
@@ -975,7 +975,9 @@ MayaEggMesh *MayaEggLoader::GetMesh(EggVertexPool *pool, EggGroup *parent)
   MayaEggMesh *result = _mesh_tab[parent];
   if (result == 0) {
     result = new MayaEggMesh;
-    result->_name = parent->get_name();
+    if (parent != nullptr) {
+      result->_name = parent->get_name();
+    }
     result->_pool = pool;
     result->_parent = parent;
     result->_vert_count = 0;