Fixed NameError: Defined model_dir

app.py

@@ -18,6 +18,9 @@ delta_H = -50000  # Heat of reaction (J/mol)
 rho = 1   # Density in kg/L
 Cp = 4184  # Heat capacity in J/kg·K
 
+# Define the model directory
+model_dir = "./model"
+
 # Define Gradio inference function
 def predict_cstr(CA_in, T_in, F):
     # Load scalers and model