merge develop -Dorg -Ssuccess-only: PR 6309 (add try block)

examples/Training/python/ROIs.py

@@ -286,4 +286,8 @@ def create_mask(mask_bytes, bytes_per_pixel=1):
 # Close connection
 # ================
 # When you are done, close the session to free up server resources.
-conn.close()
+try:
+    conn.close()
+except Exception as e:
+    print(e)
+