Update app.py

app.py

@@ -903,6 +903,7 @@ def predict_middle(image, enable_fillet, fillet_value_mm):
 def predict_full(image, enable_fillet, fillet_value_mm, enable_finger_cut, selected_outputs):
     """
     Returns DXF + conditionally selected additional outputs
+    Always returns exactly 4 values to match output components
     """
     radius = fillet_value_mm if enable_fillet == "On" else 0
     finger_flag = "On" if enable_finger_cut == "On" else "Off"
@@ -916,17 +917,13 @@ def predict_full(image, enable_fillet, fillet_value_mm, enable_finger_cut, selec
         finger_clearance=finger_flag,
     )
     
-    # Build return tuple based on selected outputs
-    results = [dxf_path]  # DXF always included
-    
-    if "Annotated Image" in selected_outputs:
-        results.append(ann)
-    if "Outlines" in selected_outputs:
-        results.append(outlines)
-    if "Mask" in selected_outputs:
-        results.append(mask)
-    
-    return results
+    # Always return 4 values to match the 4 output components
+    return (
+        dxf_path,  # Always return DXF
+        ann if "Annotated Image" in selected_outputs else None,
+        outlines if "Outlines" in selected_outputs else None,
+        mask if "Mask" in selected_outputs else None
+    )