diff --git a/src/Gui/ApplicationPy.cpp b/src/Gui/ApplicationPy.cpp
index ceb1a46c005e..4d338cb41b89 100644
--- a/src/Gui/ApplicationPy.cpp
+++ b/src/Gui/ApplicationPy.cpp
@@ -1038,6 +1038,10 @@ PyObject* Application::sAddCommand(PyObject * /*self*/, PyObject *args)
     try {
         Base::PyGILStateLocker lock;
         Py::Module mod(PyImport_ImportModule("inspect"), true);
+        if (mod.isNull()) {
+            PyErr_SetString(PyExc_ImportError, "Cannot load inspect module");
+            return 0;
+        }
         Py::Callable inspect(mod.getAttr("stack"));
         Py::Tuple args;
         Py::List list(inspect.apply(args));
diff --git a/src/Mod/Mesh/App/Mesh.cpp b/src/Mod/Mesh/App/Mesh.cpp
index 492f848cbb6a..4c38b968eda5 100644
--- a/src/Mod/Mesh/App/Mesh.cpp
+++ b/src/Mod/Mesh/App/Mesh.cpp
@@ -1504,6 +1504,8 @@ MeshObject* MeshObject::createSphere(float radius, int sampling)
     Base::PyGILStateLocker lock;
     try {
         Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
+        if (module.isNull())
+            return 0;
         Py::Dict dict = module.getDict();
         Py::Callable call(dict.getItem("Sphere"));
         Py::Tuple args(2);
@@ -1529,6 +1531,8 @@ MeshObject* MeshObject::createEllipsoid(float radius1, float radius2, int sampli
     Base::PyGILStateLocker lock;
     try {
         Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
+        if (module.isNull())
+            return 0;
         Py::Dict dict = module.getDict();
         Py::Callable call(dict.getItem("Ellipsoid"));
         Py::Tuple args(3);
@@ -1555,6 +1559,8 @@ MeshObject* MeshObject::createCylinder(float radius, float length, int closed, f
     Base::PyGILStateLocker lock;
     try {
         Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
+        if (module.isNull())
+            return 0;
         Py::Dict dict = module.getDict();
         Py::Callable call(dict.getItem("Cylinder"));
         Py::Tuple args(5);
@@ -1585,6 +1591,8 @@ MeshObject* MeshObject::createCone(float radius1, float radius2, float len, int
     Base::PyGILStateLocker lock;
     try {
         Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
+        if (module.isNull())
+            return 0;
         Py::Dict dict = module.getDict();
         Py::Callable call(dict.getItem("Cone"));
         Py::Tuple args(6);
@@ -1616,6 +1624,8 @@ MeshObject* MeshObject::createTorus(float radius1, float radius2, int sampling)
     Base::PyGILStateLocker lock;
     try {
         Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
+        if (module.isNull())
+            return 0;
         Py::Dict dict = module.getDict();
         Py::Callable call(dict.getItem("Toroid"));
         Py::Tuple args(3);
@@ -1642,6 +1652,8 @@ MeshObject* MeshObject::createCube(float length, float width, float height)
     Base::PyGILStateLocker lock;
     try {
         Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
+        if (module.isNull())
+            return 0;
         Py::Dict dict = module.getDict();
         Py::Callable call(dict.getItem("Cube"));
         Py::Tuple args(3);
@@ -1664,6 +1676,8 @@ MeshObject* MeshObject::createCube(float length, float width, float height, floa
     Base::PyGILStateLocker lock;
     try {
         Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
+        if (module.isNull())
+            return 0;
         Py::Dict dict = module.getDict();
         Py::Callable call(dict.getItem("FineCube"));
         Py::Tuple args(4);
diff --git a/src/Mod/Part/App/AttachEnginePyImp.cpp b/src/Mod/Part/App/AttachEnginePyImp.cpp
index ba84e2181c77..fa746c1db605 100644
--- a/src/Mod/Part/App/AttachEnginePyImp.cpp
+++ b/src/Mod/Part/App/AttachEnginePyImp.cpp
@@ -262,7 +262,7 @@ PyObject* AttachEnginePy::getModeInfo(PyObject* args)
 #endif
         try {
             Py::Module module(PyImport_ImportModule("PartGui"),true);
-            if (!module.hasAttr("AttachEngineResources")) {
+            if (module.isNull() || !module.hasAttr("AttachEngineResources")) {
                 // in v0.14+, the GUI module can be loaded in console mode (but doesn't have all its document methods)
                 throw Py::RuntimeError("Gui is not up");//DeepSOIC: wanted to throw ImportError here, but it's not defined, so I don't know...
             }
@@ -357,7 +357,7 @@ PyObject* AttachEnginePy::getRefTypeInfo(PyObject* args)
 
         try {
             Py::Module module(PyImport_ImportModule("PartGui"),true);
-            if (!module.hasAttr("AttachEngineResources")) {
+            if (module.isNull() || !module.hasAttr("AttachEngineResources")) {
                 // in v0.14+, the GUI module can be loaded in console mode (but doesn't have all its document methods)
                 throw Py::RuntimeError("Gui is not up");//DeepSOIC: wanted to throw ImportError here, but it's not defined, so I don't know...
             }