diff --git a/main.py b/main.py
index 14c2fd5..bea5a4c 100644
--- a/main.py
+++ b/main.py
@@ -257,23 +257,6 @@ class BeamlineEditor(QtWidgets.QMainWindow, Ui_BeamlineGUI):
                 nextVar=None
         return
 
-        if a > 2:
-            root = self.elementDB[id0].firstElementID
-            domain=self.elementDB[root]
-            tree = self.editor.flatten(root, alt+1)
-            subsec = []
-            for ele in tree.path:
-                if isinstance(self.elementDB[ele], LineContainer):
-                    container=self.elementDB[ele].Name
-                    self.exporter.writeSection(container,self.elementDB[ele].LengthRes)
-                    startid = self.elementDB[ele].firstElementID
-                    if startid in self.elementDB.keys():
-                        subtree=self.editor.flatten(startid, alt+1)
-                        for atomic in subtree.path:
-                            self.exporter.writeElement(container,self.elementDB[atomic])
-                    subsec.append(container)
-            self.exporter.writeDomain(references[sec],sec,domain.LengthRes,subsec)
-        self.exporter.buildCaseFooter()
 
     def exportLayoutasPL(self):
         ok = export_table_to_excel(self.UIProtoList,"Protolist/Export/protolist.xlsx","Proto-HL")
@@ -469,26 +452,26 @@ class BeamlineEditor(QtWidgets.QMainWindow, Ui_BeamlineGUI):
             self.elementDB[key].LengthRes=self.branchingTemp[key]
         return line
 
-    def unwrap(self, name, node_id,line,case_num):
+    def unwrap(self, name, node_id,line,case_num) -> bool :
         if self.verbose:
-            print('Unwrapping Line: %s' % name)
-        tree=self.editor.flatten(node_id,case_num)
-        secondBranch = False
+            print('Unwrapping Line: %s' % name)     # this is a container -> checked in flattenSingleLine
+        tree=self.editor.flatten(node_id,case_num)  # get the tree
+        secondBranch = False                        # default go along primary branch
         for ele in tree.path:
-            if self.targetReached:
-                return
-            self.report(ele, name)
-            type = self.editor.getElementType(ele)
-            if type == 'Line':
+            if self.targetReached:                  # a Target element (Marker) encountered -> no need to further unroll the line
+                return False                        # no branching needed
+            self.report(ele, name)                  # if self.verbose -> print element name and type
+            type = self.editor.getElementType(ele)  # get type of element in the trunc path of the container.
+            if type == 'Line':                      # if it is a line container (in a line container -> unwrap this line)
                 line.append(self.elementDB[ele],sRef=0,Ref='relative')
                 subline = self.elementDB[ele]
                 subline.clear()
                 name1 = subline.Name
                 ref = subline.firstElementID
-                if ref in self.elementDB.keys():
-                    secondBranch = self.unwrap(name + name1, ref, subline,case_num)
+                if ref in self.elementDB.keys():   # unwrap the line container in a recursive manner
+                    secondBranch = self.unwrap(name + name1, ref, subline,case_num)  # returns true if the subline has a branching point(dipole)
                     if secondBranch:
-                        print('Was branching - should continue with second branch, returning from',name+name1)
+                        #print('Sub-Container',name+name1," has branching - should continue with second branch")
                         break  # do not continue with any other elements
                 else:
                     if self.verbose:
@@ -506,6 +489,7 @@ class BeamlineEditor(QtWidgets.QMainWindow, Ui_BeamlineGUI):
                 print('   Target reached:',self.elementDB[ele].Name)
                 self.targetReached=True
             else:
+                # this is a basic (atomic element), excluding line containers, markers and variable containers
                 sRef=self.elementDB[ele].OffsetS
                 Ref='absolute'
                 if self.elementDB[ele].relOff:
@@ -528,21 +512,23 @@ class BeamlineEditor(QtWidgets.QMainWindow, Ui_BeamlineGUI):
                         self.elementDB[ele].angle = self.elementDB[ele].design_angle
                         line.hasBranchPoint = True
                         secondBranch=True
-                        return secondBranch
+                        break
                     else:
                         self.elementDB[ele].angle=0
                         line.hasBranchPoint = False
         if secondBranch:
-            print("There should be now following the second branch from container:", name,tree.secondary)
+            #print("There should be now following the second branch from container:", name)
             if tree.secondary:
-                print("Has secondary tree", name)
-                self.unwrap(name, tree.secondary.node_id, line, case_num)
+                #print("Has secondary tree", name)
+                secondBranch = self.unwrap(name, tree.secondary.node_id, line, case_num)
+                #print('Still needs branching one level above after unwrapping second branch:',secondBranch)
+                return secondBranch
             else:
-                print("Has no secondary tree", name,'- returning to parent container')
+                #print("Has no secondary tree", name,'- returning to parent container')
                 return secondBranch
         else:
             if tree.primary:
-                self.unwrap(name,tree.primary.node_id,line,case_num)
+                secondBranch = self.unwrap(name,tree.primary.node_id,line,case_num)
         return secondBranch
 
 
diff --git a/protoliste.py b/protoliste.py
index bcf2267..e4acf69 100644
--- a/protoliste.py
+++ b/protoliste.py
@@ -334,6 +334,8 @@ class ProtoListe(ApplicationTemplate):
             channels=ele['PSChannels']
         if ele.Baugruppe=='U15':
             channels=channels+1
+        elif ele.Baugruppe == 'SFPlus-U12-AB':
+            channels=channels+1
         if ele.Baugruppe == 'UE38':
             channels = channels + 2
         if ele.Baugruppe=='QFU':