diff --git a/measureSequences/Sequence_editor.py b/measureSequences/Sequence_editor.py
index ffdd071..c2a10b7 100644
--- a/measureSequences/Sequence_editor.py
+++ b/measureSequences/Sequence_editor.py
@@ -23,6 +23,7 @@
 import threading
 
 from .util import Window_ui
+from .util import ExceptionHandling
 from .Sequence_parsing import Sequence_parser
 
 from .qlistmodel import SequenceListModel
@@ -279,12 +280,14 @@ class Sequence_builder(Window_ui, Sequence_parser):
 
     sig_runSequence = pyqtSignal(list)
     sig_abortSequence = pyqtSignal()
+    sig_assertion = pyqtSignal(str)
 
     def __init__(self, parent=None, **kwargs):
         super().__init__(
             ui_file=pkg_resources.resource_filename(__name__, "configurations\\sequence.ui"), **kwargs)
 
         # self.listSequence.sig_dropped.connect(lambda value: self.dropreact(value))
+        self.__name__ = 'Sequence_builder'
 
         QTimer.singleShot(0, self.initialize_all_windows)
         # QTimer.singleShot(
@@ -317,10 +320,12 @@ def __init__(self, parent=None, **kwargs):
     def init_data(self):
         self.data = []
 
+    @ExceptionHandling
     def running_sequence(self):
         self.data = self.model.pass_data()
         self.sig_runSequence.emit(deepcopy(self.data))
 
+    @ExceptionHandling
     def addItem_toSequence(self, text):
         """
             depending on the Item clicked, add the correct Item to the model,
@@ -354,6 +359,7 @@ def addItem_toSequence(self, text):
         if text.text(0) == 'Shutdown Temperature Control':
             raise NotImplementedError
 
+    @ExceptionHandling
     def addWaiting(self, data):
         string = self.displaytext_waiting(data)
         data.update(dict(DisplayText=string))
@@ -362,6 +368,7 @@ def addWaiting(self, data):
         QTimer.singleShot(1, lambda: self.listSequence.repaint())
         # QTimer.singleShot(10, self.model.)
 
+    @ExceptionHandling
     def addTscan(self, data):
         string = self.displaytext_scan_T(data)
         data.update(dict(DisplayText=string))
@@ -381,6 +388,7 @@ def printing(self, data):
     #     with open(self.sequence_file_json, 'w') as output:
     #         output.write(json.dumps(self.data))
 
+    @ExceptionHandling
     def initialize_all_windows(self):
         self.initialise_window_waiting()
         self.initialise_window_Tscan()
@@ -401,6 +409,7 @@ def initialise_window_ChangeDataFile(self):
         self.Window_ChangeDataFile.sig_accept.connect(
             lambda value: self.addChangeDataFile(value))
 
+    @ExceptionHandling
     def window_FileDialogSave(self):
         self.sequence_file_json, __ = QtWidgets.QFileDialog.getSaveFileName(self, 'Save As',
                                                                             'c:\\', "Serialised (*.json)")
@@ -409,12 +418,14 @@ def window_FileDialogSave(self):
         self.sequence_file_p = self.sequence_file_json[:-4] + 'pkl'
         # self.sequence_file_json = self.sequence_file[:-3] + 'json'
 
+    # @ExceptionHandling
     def window_FileDialogOpen(self):
         self.sequence_file, __ = QtWidgets.QFileDialog.getOpenFileName(self, 'Save As',
                                                                        'c:\\', "Sequence files (*.seq)")
         self.lineFileLocation.setText(self.sequence_file)
         self.initialize_sequence(self.sequence_file)
 
+    @ExceptionHandling
     def initialize_sequence(self, sequence_file):
         """build & run the sequence parsing, add items to the display model"""
         super().initialize_sequence(sequence_file)
diff --git a/measureSequences/util.py b/measureSequences/util.py
index 4791946..bf7efc0 100644
--- a/measureSequences/util.py
+++ b/measureSequences/util.py
@@ -28,6 +28,52 @@
 from PyQt5 import QtWidgets
 from PyQt5.uic import loadUi
 
+import functools
+import inspect
+
+
+def ExceptionSignal(thread, func, e_type, err):
+    """Emit assertion-signal with relevant information"""
+    thread.sig_assertion.emit('{}: {}: {}: {}'.format(
+        thread.__name__,
+        func.__name__,
+        e_type,
+        err.args[0]))
+
+
+def ExceptionHandling(func):
+    @functools.wraps(func)
+    def wrapper_ExceptionHandling(*args, **kwargs):
+        if inspect.isclass(type(args[0])):
+            try:
+                return func(*args, **kwargs)
+            except AssertionError as e_ass:
+                ExceptionSignal(args[0], func, 'Assertion', e_ass)
+
+            except TypeError as e_type:
+                ExceptionSignal(args[0], func, 'Type', e_type)
+
+            except KeyError as e_key:
+                ExceptionSignal(args[0], func, 'Key', e_key)
+
+            except ValueError as e_val:
+                ExceptionSignal(args[0], func, 'Value', e_val)
+
+            except AttributeError as e_attr:
+                ExceptionSignal(args[0], func, 'Attribute', e_attr)
+
+            except NotImplementedError as e_implement:
+                ExceptionSignal(args[0], func, 'NotImplemented', e_implement)
+
+            except OSError as e:
+                ExceptionSignal(args[0], func, 'OSError', e)
+
+            except IndexError as e:
+                ExceptionSignal(args[0], func, 'IndexError', e)
+        else:
+            print('There is a bug!! ' + func.__name__)
+    return wrapper_ExceptionHandling
+
 
 def ScanningN(start, end, N):
     """utility function for building linspaced number-sequences"""
diff --git a/requirements.txt b/requirements.txt
index bb61c44..504bddc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 numpy
-PyQt5
\ No newline at end of file
+PyQt5
+functools
\ No newline at end of file
diff --git a/setup.py b/setup.py
index e9f63d6..d6a0713 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
     download_url='https://github.com/bklebel/measureSequences/archive/0.1.6.tar.gz',
     # packages=setuptools.find_packages(),
     packages=['measureSequences'],
-    install_requires=['numpy', 'PyQt5'],
+    install_requires=['numpy', 'PyQt5', 'functools'],
     include_package_data=True,
     classifiers=[
         "Programming Language :: Python :: 3",