diff --git a/src/Mod/Spreadsheet/App/Cell.cpp b/src/Mod/Spreadsheet/App/Cell.cpp
index 7df1ca66af..db7642969e 100644
--- a/src/Mod/Spreadsheet/App/Cell.cpp
+++ b/src/Mod/Spreadsheet/App/Cell.cpp
@@ -88,6 +88,7 @@ Cell::Cell(const CellAddress &_address, PropertySheet *_owner)
     , foregroundColor(0, 0, 0, 1)
     , backgroundColor(1, 1, 1, 0)
     , displayUnit()
+    , alias()
     , computedUnit()
     , rowSpan(1)
     , colSpan(1)
@@ -96,14 +97,9 @@ Cell::Cell(const CellAddress &_address, PropertySheet *_owner)
     assert(address.isValid());
 }
 
-/**
-  * Destroy a CellContent object.
-  *
-  */
-
-Cell::Cell(const Cell &other)
+Cell::Cell(PropertySheet *_owner, const Cell &other)
     : address(other.address)
-    , owner(other.owner)
+    , owner(_owner)
     , used(other.used)
     , expression(other.expression ? other.expression->copy() : 0)
     , alignment(other.alignment)
@@ -111,32 +107,40 @@ Cell::Cell(const Cell &other)
     , foregroundColor(other.foregroundColor)
     , backgroundColor(other.backgroundColor)
     , displayUnit(other.displayUnit)
+    , alias(other.alias)
     , computedUnit(other.computedUnit)
     , rowSpan(other.rowSpan)
     , colSpan(other.colSpan)
 {
+    setUsed(MARK_SET, false);
 }
 
 Cell &Cell::operator =(const Cell &rhs)
 {
     PropertySheet::AtomicPropertyChange signaller(*owner);
 
-    used = 0;
     address = rhs.address;
-    owner = rhs.owner;
 
     setExpression(rhs.expression ? rhs.expression->copy() : 0);
-    setStyle(rhs.style);
     setAlignment(rhs.alignment);
-    setForeground(rhs.foregroundColor);
+    setStyle(rhs.style);
     setBackground(rhs.backgroundColor);
+    setForeground(rhs.foregroundColor);
     setDisplayUnit(rhs.displayUnit.stringRep);
     setComputedUnit(rhs.computedUnit);
+    setAlias(rhs.alias);
     setSpans(rhs.rowSpan, rhs.colSpan);
 
+    setUsed(MARK_SET, false);
+
     return *this;
 }
 
+/**
+  * Destroy a CellContent object.
+  *
+  */
+
 Cell::~Cell()
 {
     if (expression)
diff --git a/src/Mod/Spreadsheet/App/Cell.h b/src/Mod/Spreadsheet/App/Cell.h
index 84b2000277..0f23c8ce73 100644
--- a/src/Mod/Spreadsheet/App/Cell.h
+++ b/src/Mod/Spreadsheet/App/Cell.h
@@ -47,12 +47,13 @@ class PropertySheet;
 class DisplayUnit;
 
 class SpreadsheetExport Cell {
-
+private:
+    Cell(const Cell & other);
 public:
 
     Cell(const App::CellAddress & _address, PropertySheet * _owner);
 
-    Cell(const Cell & other);
+    Cell(PropertySheet * _owner, const Cell & other);
 
     Cell& operator=( const Cell& rhs );
 
diff --git a/src/Mod/Spreadsheet/App/PropertySheet.cpp b/src/Mod/Spreadsheet/App/PropertySheet.cpp
index 893d466918..7f09078664 100644
--- a/src/Mod/Spreadsheet/App/PropertySheet.cpp
+++ b/src/Mod/Spreadsheet/App/PropertySheet.cpp
@@ -212,13 +212,20 @@ PropertySheet::PropertySheet(const PropertySheet &other)
     , mergedCells(other.mergedCells)
     , owner(other.owner)
     , propertyNameToCellMap(other.propertyNameToCellMap)
+    , cellToPropertyNameMap(other.cellToPropertyNameMap)
     , documentObjectToCellMap(other.documentObjectToCellMap)
+    , cellToDocumentObjectMap(other.cellToDocumentObjectMap)
+    , docDeps(other.docDeps)
+    , documentObjectName(other.documentObjectName)
+    , documentName(other.documentName)
+    , aliasProp(other.aliasProp)
+    , revAliasProp(other.revAliasProp)
 {
     std::map<CellAddress, Cell* >::const_iterator i = other.data.begin();
 
     /* Copy cells */
     while (i != other.data.end()) {
-        data[i->first] = new Cell(*i->second);
+        data[i->first] = new Cell(this, *i->second);
         ++i;
     }
 }
@@ -256,7 +263,7 @@ void PropertySheet::Paste(const Property &from)
             recomputeDependencies(ifrom->first);
         }
         else {
-            data[ifrom->first] = new Cell(*(ifrom->second)); // Doesn't exist, copy using Cell's copy constructor
+            data[ifrom->first] = new Cell(this, *(ifrom->second)); // Doesn't exist, copy using Cell's copy constructor
         }
 
         /* Set dirty */
diff --git a/src/Mod/Spreadsheet/Gui/SpreadsheetView.cpp b/src/Mod/Spreadsheet/Gui/SpreadsheetView.cpp
index 10c349e1bc..8b04280b9b 100644
--- a/src/Mod/Spreadsheet/Gui/SpreadsheetView.cpp
+++ b/src/Mod/Spreadsheet/Gui/SpreadsheetView.cpp
@@ -130,14 +130,14 @@ bool SheetView::onMsg(const char *pMsg, const char **ppReturn)
         getGuiDocument()->undo(1);
         App::Document* doc = getAppDocument();
         if (doc)
-            doc->recomputeFeature(sheet);
+            doc->recompute();
         return true;
     }
     else  if(strcmp("Redo",pMsg) == 0 ) {
         getGuiDocument()->redo(1);
         App::Document* doc = getAppDocument();
         if (doc)
-            doc->recomputeFeature(sheet);
+            doc->recompute();
         return true;
     }
     else if (strcmp("Save",pMsg) == 0) {