diff --git a/src/gui_qt/io/asciireader.py b/src/gui_qt/io/asciireader.py
index a4c9524..2520844 100644
--- a/src/gui_qt/io/asciireader.py
+++ b/src/gui_qt/io/asciireader.py
@@ -38,7 +38,7 @@ class QAsciiReader(QtWidgets.QDialog, Ui_ascii_reader):
         self.changestaggeredrange(0)
 
         self.ascii_table.contextMenuEvent = self.ctx_table
-        self.ascii_table.horizontalHeader().setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
+        self.ascii_table.horizontalHeader().setContextMenuPolicy(QtCore.Qt.ContextMenuPolicy.CustomContextMenu)
         self.ascii_table.horizontalHeader().customContextMenuRequested.connect(self.ctx_table)
 
         self.skip = False
@@ -65,7 +65,7 @@ class QAsciiReader(QtWidgets.QDialog, Ui_ascii_reader):
         self.set_column_names(1)
 
         self.skippy_checkbox.blockSignals(True)
-        self.skippy_checkbox.setCheckState(QtCore.Qt.Unchecked)
+        self.skippy_checkbox.setCheckState(QtCore.Qt.CheckState.Unchecked)
         self.skippy_checkbox.blockSignals(False)
 
         return self
@@ -232,7 +232,7 @@ class QAsciiReader(QtWidgets.QDialog, Ui_ascii_reader):
 
     @QtCore.pyqtSlot(int, name='on_buttonGroup_buttonClicked')
     def show_error(self, val: int):
-        self.deltay_lineEdit.setEnabled(val == -3)
+        self.deltay_lineEdit.setEnabled(val == -2)
 
     @QtCore.pyqtSlot(int, name='on_skippy_checkbox_stateChanged')
     def skip_next_dial(self, _: int):
diff --git a/src/nmreval/fit/result.py b/src/nmreval/fit/result.py
index d77fd88..bd954b4 100644
--- a/src/nmreval/fit/result.py
+++ b/src/nmreval/fit/result.py
@@ -401,7 +401,10 @@ class FitResult(Points):
             raise ValueError('no fit function available to calculate new y values')
 
         new_fit = self.copy()
-        y_values = self.func.func(self.p_final, x_values, **self.fun_kwargs)
+        fun_kwargs = {k: v for k, v in self.fun_kwargs.items()}
+        if self.fun_kwargs.get('complex_mode', -1) == -1:
+            fun_kwargs.pop('complex_mode', None)
+        y_values = self.func.func(self.p_final, x_values, **fun_kwargs)
         y_values = check_complex(y_values, self.fun_kwargs.get('complex_mode', -1), self._data_complex)
 
         new_fit.set_data(x_values, y_values, y_err=0.0)
@@ -414,6 +417,9 @@ class FitResult(Points):
 
         part_functions = []
         actual_mode = self.fun_kwargs.get('complex_mode', -1)
+        fun_kwargs = {k: v for k, v in self.fun_kwargs.items()}
+        if self.fun_kwargs.get('complex_mode', -1) == -1:
+            fun_kwargs.pop('complex_mode', None)
 
         for sub_name, sub_y in zip(self.func.sub_name(), self.func.sub(self.p_final, x_values, **self.fun_kwargs)):
             sub_y = check_complex(sub_y, actual_mode, self._data_complex)
diff --git a/src/nmreval/io/asciireader.py b/src/nmreval/io/asciireader.py
index 05f84a5..6a31318 100644
--- a/src/nmreval/io/asciireader.py
+++ b/src/nmreval/io/asciireader.py
@@ -49,7 +49,7 @@ class AsciiReader:
         with self.fname.open('r') as f:
             for i, line in enumerate(islice(f, len(self.header)+len(self.lines), num_lines)):
                 line = line.strip('\n\t\r, ')
-                line = re.sub(r'[\t ;,] *', ';', line)
+                line = re.sub(r'[\t ;,]+', ';', line)
                 line = line.split(';')
 
                 try: