diff --git a/hp4155/ADU for double gate devices-test/double_gate_ADU_interface.ipynb b/hp4155/ADU for double gate devices-test/double_gate_ADU_interface.ipynb
index 5a223056eca8429d5ccfae1645051684b4e3b808..faa36259919455bea1477b2715bf94ac309e80f5 100644
--- a/hp4155/ADU for double gate devices-test/double_gate_ADU_interface.ipynb	
+++ b/hp4155/ADU for double gate devices-test/double_gate_ADU_interface.ipynb	
@@ -9,7 +9,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "e17b02dca07148ae85036ca6e597972b",
+       "model_id": "3cf0faebf88c45f49e903b375a7612b4",
        "version_major": 2,
        "version_minor": 0
       },
@@ -23,7 +23,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "cbd815fcdfe044f49837a43725952507",
+       "model_id": "e0c490c25be140d78098258f89fe2c7c",
        "version_major": 2,
        "version_minor": 0
       },
@@ -37,7 +37,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "e87d9d231a614b31b1f0c0134a4cdbe5",
+       "model_id": "c2beee9304734535a652146df18f2fb1",
        "version_major": 2,
        "version_minor": 0
       },
@@ -51,7 +51,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "3222ed014163431eb9b651247256caa7",
+       "model_id": "17d7289741454a9f9f701f7b47ac38ce",
        "version_major": 2,
        "version_minor": 0
       },
@@ -65,7 +65,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "8a0a185bf8a74f3eb6b08a0f4beff52f",
+       "model_id": "55e13e645e6e429dade45a3f97226e0b",
        "version_major": 2,
        "version_minor": 0
       },
@@ -81,29 +81,10 @@
     "%run double_gate_ADU.py"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "id": "0ee5162d-3693-4f4a-a9dc-2159c80e7008",
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "+0,\"No error\"\n",
-      "\n"
-     ]
-    }
-   ],
-   "source": [
-    "print(device.error())"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "db297f4d-f586-4b69-8994-e05ebf68605f",
+   "id": "1a0e956e-9d25-481e-b1ec-b03babcb4c19",
    "metadata": {},
    "outputs": [],
    "source": []
diff --git a/hp4155/ADU for double gate devices-test/lib/help.py b/hp4155/ADU for double gate devices-test/lib/help.py
index 2c539b160d4f0e18ed28e467935770295c948cdb..0723fd389877aa224646d90084b8dee169fcd371 100644
--- a/hp4155/ADU for double gate devices-test/lib/help.py	
+++ b/hp4155/ADU for double gate devices-test/lib/help.py	
@@ -219,53 +219,35 @@ def graph_tool(params,device):
                 device.user_function(element,"mA/mm",f"{element[:-2]}*{normalization_factor(params['SAMPLE']['width'])}") #max 3
     
             #define the absolute(A to indicate absolute) always 3 (max 6!)
-            if element.startswith("V"):
-                device.user_function('A'+element,"V",f"ABS({element})")
-            elif element.startswith('I') and element.endswith('mm'):
+            if element.startswith('I') and element.endswith('mm'):
                 device.user_function('A'+element,"mA/mm",f"ABS({element})")
-            else: # regular I
+            elif element.startswith('I') and element.endswith('mm')== False: 
                 device.user_function('A'+element,"A",f"ABS({element})")  
              
 
     # Now send the parameters in the tool
-    if params["PLOT"]["x_scale"]=='LOG':
-        device.display_variable('X',"A"+params["PLOT"]["x"])
-    else:
-        device.display_variable('X',params["PLOT"]["x"])
-
-    device.error()
+    device.display_variable('X',params["PLOT"]["x"])
     device.axis_scale('X',params["PLOT"]["x_scale"])
-    device.error()
     device.display_variable_min_max('X','MIN',params["PLOT"]["x_min"])
-    device.error()
     device.display_variable_min_max('X','MAX',params["PLOT"]["x_max"])
-    device.error()
 
 
     if params["PLOT"]["y1_scale"]=='LOG':
         device.display_variable('Y1',"A"+params["PLOT"]["y1"])
     else:
         device.display_variable('Y1',params["PLOT"]["y1"])
-    device.error()
     device.axis_scale('Y1',params["PLOT"]["y1_scale"])
-    device.error()
     device.display_variable_min_max('Y1','MIN',params["PLOT"]["y1_min"])
-    device.error()
     device.display_variable_min_max('Y1','MAX',params["PLOT"]["y1_max"])
-    device.error()
 
     if params["PLOT"]["y2"]!= "None":
         if params["PLOT"]["y2_scale"]=='LOG':
             device.display_variable('Y2',"A"+params["PLOT"]["y2"])
         else:
             device.display_variable('Y2',params["PLOT"]["y2"])
-        device.error()
         device.axis_scale('Y2',params["PLOT"]["y2_scale"])
-        device.error()
         device.display_variable_min_max('Y2','MIN',params["PLOT"]["y2_min"])
-        device.error()
         device.display_variable_min_max('Y2','MAX',params["PLOT"]["y2_max"])
-        device.error()
 
     
 
diff --git a/hp4155/ADU for double gate devices-test/lib/interface.py b/hp4155/ADU for double gate devices-test/lib/interface.py
index 46648393ca69e08ae774bafb4d4898df211accba..8cdca3cd6da686ea4d9610a4b9dbc7a29fb6ff86 100644
--- a/hp4155/ADU for double gate devices-test/lib/interface.py	
+++ b/hp4155/ADU for double gate devices-test/lib/interface.py	
@@ -243,10 +243,15 @@ def additional_secondary(name,start,step,stop,comp):
 def plot_config(meas): #meas = 1,2,3 for transfer,output,gatediode 
     config_grid = GridspecLayout(6,4)
 
+    if meas== 3:
+        options_x= ['VTG','VBG']
+    else :
+        options_x = ['VTG','VBG','VDS']
+    
     if meas ==3:
-        options = ['VTG','VBG','ITG','IBG','ITGmm','IBGmm','None']
+        options = ['ITG','IBG','ITGmm','IBGmm','None']
     else:
-        options = ['VTG','VBG','VDS','ITG','IBG','ID','ITGmm','IBGmm','IDmm','None']
+        options = ['ITG','IBG','ID','ITGmm','IBGmm','IDmm','None']
 
     # define the default values (y2 is always empty) taken from the interface
     if meas == 1:# Transfer
@@ -294,13 +299,13 @@ def plot_config(meas): #meas = 1,2,3 for transfer,output,gatediode
 
     #iterate through the second line (NAME)
     must_options = [x for x in options if x!='None']
-    config_grid[2,1]=widgets.Dropdown(layout=Layout(height='auto', width='auto'),options = must_options,value = x_name)
+    config_grid[2,1]=widgets.Dropdown(layout=Layout(height='auto', width='auto'),options = options_x,value = x_name)
     config_grid[2,2]=widgets.Dropdown(layout=Layout(height='auto', width='auto'),options = must_options,value = y1_name)
     config_grid[2,3]=widgets.Dropdown(layout=Layout(height='auto', width='auto'),options = options,value = "None")
 
     #Iterate through the third line (scale) 
     options_scale = ['LIN','LOG']
-    config_grid[3,1] = widgets.Dropdown(value = x_scale,options = options_scale, layout=Layout(height='auto', width='auto'))
+    config_grid[3,1] = widgets.Dropdown(value = x_scale,options = options_scale, layout=Layout(height='auto', width='auto'),disabled = True)
     config_grid[3,2] = widgets.Dropdown(value = y1_scale,options = options_scale, layout=Layout(height='auto', width='auto'))
     config_grid[3,3] = widgets.Dropdown(value = 'LIN',options = options_scale, layout=Layout(height='auto', width='auto'))
 
@@ -318,7 +323,7 @@ def plot_config(meas): #meas = 1,2,3 for transfer,output,gatediode
         "x":config_grid[2,1],
         "y1":config_grid[2,2],
         "y2":config_grid[2,3],
-        "x_scale":config_grid[3,1],
+        #"x_scale":config_grid[3,1],
         "y1_scale":config_grid[3,2],
         "y2_scale":config_grid[3,3],
         "x_min":config_grid[4,1],
diff --git a/hp4155/hp4155a.py b/hp4155/hp4155a.py
index 3addbd1b727bb88645b6ce381ff8bb1a7db15354..e925ca751e25e360b66f2eb04243035e3becc500 100644
--- a/hp4155/hp4155a.py
+++ b/hp4155/hp4155a.py
@@ -45,10 +45,7 @@ class HP4155a(object):
         self.inst.write(":PAGE:STR")
         
     def error(self):
-        error =self.inst.query(":SYST:ERR?")
-        if error != '+0,"No error"\n':
-            raise Exception(error)
-        return 0
+        return self.inst.query(":SYST:ERR?")
 
     def operation_completed(self):
         text = self.inst.query('*OPC?')