diff --git a/src/PyMca5/PyMcaCore/NexusDataSource.py b/src/PyMca5/PyMcaCore/NexusDataSource.py
index 309f9f144..61796ac7b 100644
--- a/src/PyMca5/PyMcaCore/NexusDataSource.py
+++ b/src/PyMca5/PyMcaCore/NexusDataSource.py
@@ -608,12 +608,21 @@ def getDataObject(self, key, selection=None):
                         output.x.append(data)
             elif cnt == 'm':
                 # support multiple monitors
-                output.m = [data]
+                if numpy.ndim(data) == 0:
+                    data_array = numpy.array([data])
+                else:
+                    data_array = numpy.array(data)
+
+                output.m = [data_array]
                 if len(selection[cnt]) > 1:
                     for midx in range(1, len(selection[cnt])):
                         mpath = entry + selection['cntlist'][selection[cnt][midx]]
                         mdata = phynxFile[mpath][()]
-                        output.m.append(mdata)
+                        if numpy.ndim(mdata) == 0:
+                            mdata_array = numpy.array([mdata])
+                        else:
+                            mdata_array = numpy.array(mdata)
+                        output.m.append(mdata_array)
 
         # SCAN specific to handle asynchronous writing
         if output.info['selectiontype'] in ["1D"]:
@@ -627,8 +636,9 @@ def getDataObject(self, key, selection=None):
                 if output.m:
                     for mi in range(len(output.m)):
                         mlength = output.m[mi].size
-                        delta = max(delta, abs(ylength - mlength))
-                        length = min(length, mlength)
+                        if mlength != 1:
+                            delta = max(delta, abs(ylength - mlength))
+                            length = min(length, mlength)
                 if delta > 1:
                     _logger.warning("Stripping last %d points" % delta)
                 elif delta == 1:
diff --git a/src/PyMca5/PyMcaGui/pymca/ScanWindow.py b/src/PyMca5/PyMcaGui/pymca/ScanWindow.py
index 564dd9029..487dfecd0 100644
--- a/src/PyMca5/PyMcaGui/pymca/ScanWindow.py
+++ b/src/PyMca5/PyMcaGui/pymca/ScanWindow.py
@@ -318,6 +318,12 @@ def _addSelection(self, selectionlist, replot=True):
                             mdata = numpy.take(dataObject.m[0], index)
                             #A priori the graph only knows about plots
                             ydata = ydata/mdata
+                        elif len(dataObject.m[0]) == 1:
+                            mvalue = dataObject.m[0][0]
+                            if mvalue == 0:
+                                raise ValueError("Do not divide by zero")
+                            mdata = numpy.array([mvalue])
+                            ydata = ydata / mdata
                         else:
                             raise ValueError("Monitor data length different than counter data")
                     else:
@@ -374,7 +380,7 @@ def _addSelection(self, selectionlist, replot=True):
                                              numpy.array([dataObject.m[imon]])
                     if dataObject.m is None:
                         mdata = numpy.ones(len(ydata)).astype(numpy.float64)
-                    elif len(dataObject.m[0]) > 0:
+                    elif all(len(m) > 0 for m in dataObject.m):
                         # Combine all monitors: divide by each one
                         combinedMdata = numpy.ones(len(ydata)).astype(numpy.float64)
                         for imon in range(len(dataObject.m)):
@@ -1486,12 +1492,8 @@ def getSvgRenderer(self, printer=None):
         if printer is None:
             # printer was not selected
             # return a renderer without adjusting the viewbox
-            if sys.version < '3.0':
-                import cStringIO as StringIO
-                imgData = StringIO.StringIO()
-            else:
-                from io import StringIO
-                imgData = StringIO()
+            from io import StringIO
+            imgData = StringIO()
             self.saveGraph(imgData, fileFormat='svg')
             imgData.flush()
             imgData.seek(0)