diff --git a/.gitignore b/.gitignore
index f25e162..fae0012 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,6 @@ vendor
 node_modules
 my_env
 venv
+.DS_Store
+.mypy_cache
+.ruff_cache
diff --git a/samples/convert_file/convert_file.py b/samples/convert_file/convert_file.py
index fd8b6cf..6c5c212 100755
--- a/samples/convert_file/convert_file.py
+++ b/samples/convert_file/convert_file.py
@@ -41,6 +41,9 @@
 if isinstance(fc.outputs, Unset):
     raise Exception("Expected outputs to be set")
 
+if fc.outputs is None:
+    raise Exception("Expected outputs to be set")
+
 outputs: Dict[str, Base64Data] = fc.outputs
 
 if len(outputs) != 1:
diff --git a/samples/file_center_of_mass/file_center_of_mass.py b/samples/file_center_of_mass/file_center_of_mass.py
index 5d381ee..1c90b62 100755
--- a/samples/file_center_of_mass/file_center_of_mass.py
+++ b/samples/file_center_of_mass/file_center_of_mass.py
@@ -33,7 +33,7 @@
 
 partInfo = {
     "title": "output.json",
-    "center_of_mass": fm.center_of_mass,
+    "center_of_mass": fm.center_of_mass.model_dump(),
 }
 
 # LITTERBOX-START-NON-EDITABLE-SECTION
diff --git a/tutorials/conversion_obj_step/conversion_obj_step.py b/tutorials/conversion_obj_step/conversion_obj_step.py
index 0591796..fe16621 100755
--- a/tutorials/conversion_obj_step/conversion_obj_step.py
+++ b/tutorials/conversion_obj_step/conversion_obj_step.py
@@ -40,6 +40,9 @@
 if isinstance(fc.outputs, Unset):
     raise Exception("Expected outputs to be set")
 
+if fc.outputs is None:
+    raise Exception("Expected outputs to be set")
+
 outputs: Dict[str, Base64Data] = fc.outputs
 
 if len(outputs) != 1:
diff --git a/tutorials/conversion_obj_stl/conversion_obj_stl.py b/tutorials/conversion_obj_stl/conversion_obj_stl.py
index fb83a45..87cd167 100755
--- a/tutorials/conversion_obj_stl/conversion_obj_stl.py
+++ b/tutorials/conversion_obj_stl/conversion_obj_stl.py
@@ -41,6 +41,9 @@
 if isinstance(fc.outputs, Unset):
     raise Exception("Expected outputs to be set")
 
+if fc.outputs is None:
+    raise Exception("Expected outputs to be set")
+
 outputs: Dict[str, Base64Data] = fc.outputs
 
 if len(outputs) != 1:
diff --git a/tutorials/getting_started/getting_started.py b/tutorials/getting_started/getting_started.py
index e23650f..d3a2fcc 100755
--- a/tutorials/getting_started/getting_started.py
+++ b/tutorials/getting_started/getting_started.py
@@ -42,6 +42,9 @@
 if isinstance(fc.outputs, Unset):
     raise Exception("Expected outputs to be set")
 
+if fc.outputs is None:
+    raise Exception("Expected outputs to be set")
+
 outputs: Dict[str, Base64Data] = fc.outputs
 
 if len(outputs) != 1: