diff --git a/pySim/ts_31_102.py b/pySim/ts_31_102.py
index fec81bfb..fa3af75c 100644
--- a/pySim/ts_31_102.py
+++ b/pySim/ts_31_102.py
@@ -609,6 +609,7 @@ class EF_UServiceTable(TransparentEF):
                     should_exist = f.should_exist_for_services(active_services)
                     try:
                         cmd.rs.select_file(f)
+                        sw = None
                         exists = True
                     except SwMatchError as e:
                         sw = str(e)