diff --git a/src/components/component.py b/src/components/component.py
index 93c8a33..6328053 100644
--- a/src/components/component.py
+++ b/src/components/component.py
@@ -79,7 +79,10 @@ class Component(QObject):
         self._set_sources.connect(self._do_set_sources)
         self._set_period.connect(self._do_set_period)
         if self.config is not None:
-            self.config.updated.connect(self._config_changed)
+            try:
+                self.config.updated.connect(self._config_changed)
+            except AttributeError:
+                pass
         self._config_changed()
         self._init_periodic()
         self._started = True
diff --git a/src/components/os_label_printer.py b/src/components/os_label_printer.py
index 3d84263..875685e 100644
--- a/src/components/os_label_printer.py
+++ b/src/components/os_label_printer.py
@@ -9,9 +9,10 @@ from .component import Component
 class Os_Label_Printer(Component):
     def __init__(self, config=None, name=None):
         super().__init__(config=config, name=name, threaded=False)
+        self.simulate = False
         if "--sim-os-label-printer" in sys.argv:
             self.simulate = True
-
+        self.platform = "windows"
     def config_changed(self):
         self.platform = self.config[self.name]["platform"]
         # for windows:
@@ -31,7 +32,7 @@ class Os_Label_Printer(Component):
             label = f.read()
         # LABEL PRINT
         label = label.format(**context)
-        label_file = "/tmp/label.prn"
+        label_file = "tmp/label.prn"
         with open(label_file, "w", errors="surrogateescape") as f:
             label = f.write(label)
         if self.platform == "windows":
diff --git a/src/main.py b/src/main.py
index 65798fe..972f6f5 100644
--- a/src/main.py
+++ b/src/main.py
@@ -152,10 +152,10 @@ try:
 
         def open_login(self):
             tab = Login()
-            tab.successful_login.connect(self.logghed_in)
+            tab.successful_login.connect(self.logged_in)
             self.main_window.open_tab(tab)
 
-        def logghed_in(self):
+        def logged_in(self):
             session = Users.get_session()
             if session is not None:
                 if session.is_admin:
diff --git a/src/test/data/database/sqlite.db b/src/test/data/database/sqlite.db
new file mode 100644
index 0000000..040439d
Binary files /dev/null and b/src/test/data/database/sqlite.db differ
diff --git a/src/test/label_printer.py b/src/test/label_printer.py
new file mode 100644
index 0000000..ed0d43a
--- /dev/null
+++ b/src/test/label_printer.py
@@ -0,0 +1,27 @@
+from datetime import datetime
+
+from components import Os_Label_Printer
+dmtx="0AG554457062203314"
+context = {
+    "DATAMATRIX": dmtx,
+    "DATAMATRIX_TEXT": dmtx,
+    "PIECE_NUM": str(3314),
+    "DATETIME": str(datetime.now().isoformat()),
+    "SHIFT": "01",
+    "STATION": "ST-TEN-1",
+    "OPERATOR": "albano",
+    "PMAX": "6,13",
+    "PMIN": "6,13",
+    "LEAK": "0,00",
+    "TFILL": "5",
+    "TSTAB": "10",
+    "TTEST": "20",
+    "MAXLEAK": "0,03",
+    "PTESTMIN": "6,00",
+    "RESULT_L1": "ESITO",
+    "RESULT_L2": "CONFORME",
+}
+
+config={"test":{"platform":"windows","printer":"zd421"}}
+printer=Os_Label_Printer(config=config,name="test")
+printer.print_label("EtichettaR5", context=context)
diff --git a/src/ui/leak_step_editor/leak_step_editor.ui b/src/ui/leak_step_editor/leak_step_editor.ui
index 5ba165a..4582c8b 100644
--- a/src/ui/leak_step_editor/leak_step_editor.ui
+++ b/src/ui/leak_step_editor/leak_step_editor.ui
@@ -191,7 +191,7 @@
       <item row="2" column="1">
        <widget class="QSpinBox" name="settling_pressure_min_percent_sb">
         <property name="maximum">
-         <number>100</number>
+         <number>150</number>
         </property>
        </widget>
       </item>