Initial Draft

pages/3_Mapping.py

@@ -130,10 +130,13 @@ if col1.button("AI Suggest"):
             new_data.append(row)
         
         # Saving Mapping and displaying
-        st.session_state.mapping_df = pd.concat(
-                                                    [ st.session_state.mapping_df, pd.DataFrame(new_data)], 
-                                                    ignore_index=True
-                                                )
+        if new_data or len(mapping_df) <0:    
+            st.session_state.mapping_df = pd.concat(
+                                                        [ st.session_state.mapping_df, pd.DataFrame(new_data)], 
+                                                        ignore_index=True
+                                                    )
+        else:
+            st.error("Unable to map Source and Destination Files")
 
 # -- Save Button
 if col2.button("Save"):