diff --git a/src/components/modbus_component.py b/src/components/modbus_component.py
index ffdd0d6..fc438ab 100644
--- a/src/components/modbus_component.py
+++ b/src/components/modbus_component.py
@@ -33,7 +33,7 @@ class ModbusComponent(Component):
         self.lock = QMutex()
 
     def config_changed(self):
-        try:
+
             # Read configuration values
             self.method = self.config[self.name].get("method", "rtu").lower()
             self.port = self.config[self.name]["port"]
@@ -65,16 +65,16 @@ class ModbusComponent(Component):
                 if not self.client.is_socket_open():
                     raise ConnectionError(f"Connection socket not open on port {self.port}")
 
+            except FileNotFoundError as e:
+                error_message = f"Serial port error: {self.port} not found. Check your configuration."
+                #self.log.error(error_message, exc_info=True)
+                self.modbus_error_signal.emit(error_message)
+            except Exception as e:
+                error_message = f"Configuration error: {str(e)}"
+                #self.log.error(error_message, exc_info=True)
+                self.modbus_error_signal.emit(error_message)
             finally:
                 self.lock.unlock()
-        except FileNotFoundError as e:
-            error_message = f"Serial port error: {self.port} not found. Check your configuration."
-            #self.log.error(error_message, exc_info=True)
-            self.modbus_error_signal.emit(error_message)
-        except Exception as e:
-            error_message = f"Configuration error: {str(e)}"
-            #self.log.error(error_message, exc_info=True)
-            self.modbus_error_signal.emit(error_message)
 
     def _read(self, register, count=1, **kwargs):
         """Read holding registers with error handling."""
diff --git a/src/components/tecna_marposs_provaset_t3.py b/src/components/tecna_marposs_provaset_t3.py
index 7639b64..100107d 100644
--- a/src/components/tecna_marposs_provaset_t3.py
+++ b/src/components/tecna_marposs_provaset_t3.py
@@ -28,13 +28,17 @@ class TecnaMarpossProvasetT3(ModbusComponent):
         else:
             raise NotImplementedError(f"tecna t3 model {self.model!r} not implemented.")
         self.set_measure_units()
-        self.units = self.get_measure_units()
-        self.max_program_number = self.read("Max number of programs")
-        self.saver_label_count = min(abs(int(self.config[self.name].get("saver_label_count", 1))), 0b1111)
-        self.saver_print_on_fail = 1 if self.config[self.name].get("saver_print_on_fail", "no").lower() in {"yes", "y", "on", "true", "1", "x"} else 0
-        self.saver_label_template = min(abs(int(self.config[self.name].get("saver_label_template", 1))), 0b11111111)
-        self.model = self.config[self.name]["model"].lower()
-        self.log.info(f"units: {self.units}")
+        try:
+            self.units = self.get_measure_units()
+            self.max_program_number = self.read("Max number of programs")
+            self.saver_label_count = min(abs(int(self.config[self.name].get("saver_label_count", 1))), 0b1111)
+            self.saver_print_on_fail = 1 if self.config[self.name].get("saver_print_on_fail", "no").lower() in {"yes", "y", "on", "true", "1", "x"} else 0
+            self.saver_label_template = min(abs(int(self.config[self.name].get("saver_label_template", 1))), 0b11111111)
+            self.model = self.config[self.name]["model"].lower()
+            self.log.info(f"units: {self.units}")
+        except Exception as e:
+            error_message = f"Error during config_changed operation: {str(e)}"
+            self.tecna_error_signal.emit(True, error_message)
 
     _pressure_units = {"mH2O": 0, "mbar": 1, "kPa": 2, "mmHg": 3, "inH2O": 4, "psi": 5, "mmH2O": 6, }   # (se fondoscala <=6 bar)
     _leak_units = {"mmH2O": 0, "mbar": 1, "Pa": 2, "mmHg": 3, "inH2O": 4, "psi": 5, }
diff --git a/src/ui/test_leak/test_leak.py b/src/ui/test_leak/test_leak.py
index 89083ca..b83c073 100644
--- a/src/ui/test_leak/test_leak.py
+++ b/src/ui/test_leak/test_leak.py
@@ -325,5 +325,4 @@ class Test_Leak(Test_Test):
                 text=f"ERRORE TECNA TEST INTERROTTO.",
                 bg_color="red", text_color="white"
             )
-            self.parent.fail_cycle()
             self.stop_test()