Handle save paths across Windows drives

dumas_image_nodes.py

@@ -95,6 +95,13 @@ def _safe_pattern(value):
     return value
 
 
+def _is_within_directory(parent_path, child_path):
+    try:
+        return os.path.commonpath([parent_path, child_path]) == parent_path
+    except ValueError:
+        return False
+
+
 def _next_counter(directory, filename_template):
     os.makedirs(directory, exist_ok=True)
     if "%counter%" not in filename_template:
@@ -356,7 +363,7 @@ class DumasSaveImageNode:
                     pnginfo = _build_pnginfo(prompt=prompt, extra_pnginfo=extra_pnginfo)
                 image.save(full_path, "PNG", pnginfo=pnginfo)
 
-            if os.path.commonpath([output_dir, full_path]) == output_dir:
+            if _is_within_directory(output_dir, full_path):
                 subfolder = os.path.relpath(frame_dir, output_dir)
                 ui_images.append(
                     {