diff --git a/ohmpi/hardware_components/raspberry_pi.py b/ohmpi/hardware_components/raspberry_pi.py
index d3333c085c675b8db59c1a02d9b1171e0766a39c..3bfa2af74e338b0ffbcb3775b750ac9e8af4ba29 100644
--- a/ohmpi/hardware_components/raspberry_pi.py
+++ b/ohmpi/hardware_components/raspberry_pi.py
@@ -44,6 +44,7 @@ class Ctl(CtlAbstract):
         except RuntimeWarning:
             pass
 
+        warnings.resetwarnings()
         # Extended I2C
         try:
             self.interfaces['i2c_ext'] = ExtendedI2C(4)  # 4 is defined
@@ -52,7 +53,7 @@ class Ctl(CtlAbstract):
         except Exception as e:
             self.exec_logger.warning(f'Could not initialize Extended I2C:\n{e}')
 
-        warnings.resetwarnings()
+
 
         # modbus
         try:
diff --git a/ohmpi/ohmpi.py b/ohmpi/ohmpi.py
index b21db3795f53b1098b4a8a2777062ddab891191a..ad45153b69451e6e96f8e9268a80618229d8e530 100644
--- a/ohmpi/ohmpi.py
+++ b/ohmpi/ohmpi.py
@@ -276,7 +276,7 @@ class OhmPi(object):
                         headers[i] = 'R [Ohm]'
                 icols = list(np.where(np.in1d(headers, ['A', 'B', 'M', 'N', 'R [Ohm]']))[0])
                 data = np.loadtxt(os.path.join(ddir, fname), delimiter=',',
-                                    skiprows=1, usecols=icols, ndmin=2)
+                                    skiprows=1, usecols=icols)
                 data = data[None, :] if len(data.shape) == 1 else data
                 ddic[fname.replace('.csv', '')] = {
                     'a': data[:, 0].astype(int).tolist(),
@@ -325,7 +325,7 @@ class OhmPi(object):
             Array of shape (number quadrupoles * 4).
         """
         self.exec_logger.debug(f'Loading sequence {filename}')
-        sequence = np.loadtxt(filename, delimiter=" ", dtype=np.uint32)  # load quadrupole file
+        sequence = np.loadtxt(filename, delimiter=" ", dtype=np.uint32, ndmin=2)  # load quadrupole file
 
         if sequence is not None:
             self.exec_logger.debug(f'Sequence of {sequence.shape[0]:d} quadrupoles read.')