Raise exception if file does not exist

modules/loadMesh.py

@@ -24,14 +24,22 @@ class RunwareLoadMesh:
     RETURN_NAMES = ("Base64",)
     FUNCTION = "load_mesh"
     CATEGORY = "Runware"
-    DESCRIPTION = "Load a 3D model file from a path or via upload. Base64 encodes and outputs as data URI. Connect to Runware 3D Inference Inputs meshFile."
+    DESCRIPTION = "Load a 3D model file from a path or entering a path. Base64 encodes and outputs as data URI. Connect to Runware 3D Inference Inputs meshFile."
 
     def load_mesh(self, file_path):
-        if not file_path or not isinstance(file_path, str) or not file_path.strip():
-            return ("",)
-        full_path = os.path.expanduser(file_path.strip())
-        if not os.path.isfile(full_path) or os.path.splitext(full_path)[1].lower() not in self.MESH_EXTENSIONS:
+        path = (file_path or "").strip() if isinstance(file_path, str) else ""
+        if not path:
             return ("",)
+        full_path = os.path.expanduser(path)
+        ext = os.path.splitext(full_path)[1].lower()
+        if ext not in self.MESH_EXTENSIONS:
+            raise ValueError(
+                f"Runware Load Mesh: unsupported extension '{ext}'. Expected .glb or .ply."
+            )
+        if not os.path.isfile(full_path):
+            raise FileNotFoundError(
+                f"Runware Load Mesh: file not found: {full_path}"
+            )
         with open(full_path, 'rb') as f:
             mesh_bytes = f.read()
         mesh_base64 = base64.b64encode(mesh_bytes).decode('utf-8')

modules/threeDInferenceInputs.py

@@ -17,7 +17,7 @@ class threeDInferenceInputs:
                 }),
                 "meshFile": ("STRING", {
                     "default": "",
-                    "tooltip": "Base64 data URI of mesh file (.glb or .ply) from Runware Load Mesh, or media UUID from Runware Media Upload.",
+                    "tooltip": "Base64 data URI of mesh file (.glb or .ply) from Runware Load Mesh.",
                 }),
             }
         }