diff --git a/source/RobotAPI/libraries/skills_gui/aron_tree_widget/AronTreeWidgetController.cpp b/source/RobotAPI/libraries/skills_gui/aron_tree_widget/AronTreeWidgetController.cpp
index 79d606639c320ffeba73918967d9a832de446e68..8c24f906fef8edea5f33db3b4a890431f5bc7bb4 100644
--- a/source/RobotAPI/libraries/skills_gui/aron_tree_widget/AronTreeWidgetController.cpp
+++ b/source/RobotAPI/libraries/skills_gui/aron_tree_widget/AronTreeWidgetController.cpp
@@ -136,6 +136,7 @@ namespace armarx::skills::gui
     void
     AronTreeWidgetController::onTreeWidgetItemChanged(QTreeWidgetItem* item, int column)
     {
+        
         tree->blockSignals(true);
 
         auto* aronElem = AronTreeWidgetItem::DynamicCast(item);
@@ -143,13 +144,14 @@ namespace armarx::skills::gui
         {
             aronElem->onUserChange(column);
         }
+
         // start conversion for entire tree -- this also sets the highlighting
         if (parent->childCount() == 1)
         {
             auto* aronTreeRoot = AronTreeWidgetItem::DynamicCast(parent->child(0));
-            aronTreeRoot->resetError();
             if (aronTreeRoot)
             {
+                aronTreeRoot->resetError();
                 AronTreeWidgetConverterVisitor v(parent, 0);
                 aron::type::visit(v, type);
                 aronTreeRoot->setValueErrorState(v.hasDirectError(), v.onlyChildFailedConversion());
@@ -158,6 +160,7 @@ namespace armarx::skills::gui
         // else perhaps the GUI was stopped or died.
 
         tree->blockSignals(false);
+        
     }
 
 } // namespace armarx::skills::gui
diff --git a/source/RobotAPI/libraries/skills_gui/aron_tree_widget/AronTreeWidgetItem.cpp b/source/RobotAPI/libraries/skills_gui/aron_tree_widget/AronTreeWidgetItem.cpp
index d76cee191fda8cb927548a795b53291875ae14e6..5f24c40c959e8008457c096b4d872e8407041ab8 100644
--- a/source/RobotAPI/libraries/skills_gui/aron_tree_widget/AronTreeWidgetItem.cpp
+++ b/source/RobotAPI/libraries/skills_gui/aron_tree_widget/AronTreeWidgetItem.cpp
@@ -149,6 +149,7 @@ namespace armarx::skills::gui
     void
     AronTreeWidgetItem::onUserChange(int changedColumn)
     {
+        
         QTreeWidgetItem* qParent = QTreeWidgetItem::parent();
         ARMARX_CHECK(qParent);
         AronTreeWidgetItem* aronParent = DynamicCast(qParent);
@@ -172,6 +173,7 @@ namespace armarx::skills::gui
                 preventIllegalKeyChange();
             }
         }
+        
     }
 
     void
diff --git a/source/RobotAPI/libraries/skills_gui/aron_tree_widget/visitors/AronTreeWidgetConverter.cpp b/source/RobotAPI/libraries/skills_gui/aron_tree_widget/visitors/AronTreeWidgetConverter.cpp
index 23be73d02da766a0b361f53cb53486fd91d65684..164e4498f0adcc2ca99bfdacbfcb36cf441a8879 100644
--- a/source/RobotAPI/libraries/skills_gui/aron_tree_widget/visitors/AronTreeWidgetConverter.cpp
+++ b/source/RobotAPI/libraries/skills_gui/aron_tree_widget/visitors/AronTreeWidgetConverter.cpp
@@ -75,16 +75,19 @@ namespace armarx::skills::gui
     void
     AronTreeWidgetConverterVisitor::handleErrors(bool ownFault)
     {
+        
         ARMARX_TRACE;
         isDirectError = ownFault;
         auto* aronItem = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
         ARMARX_CHECK(aronItem);
         aronItem->setValueErrorState(isDirectError, false);
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::ObjectPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronDict = std::make_shared<aron::data::Dict>(i->getPath());
         createdAron = createdAronDict;
@@ -113,11 +116,13 @@ namespace armarx::skills::gui
                 createdAronDict->addElement(key, v.createdAron);
             }
         }
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::DictPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronDict = std::make_shared<aron::data::Dict>(i->getPath());
         createdAron = createdAronDict;
@@ -146,11 +151,13 @@ namespace armarx::skills::gui
                 createdAronDict->addElement(key, v.createdAron);
             }
         }
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::ListPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronList = std::make_shared<aron::data::List>(i->getPath());
         createdAron = createdAronList;
@@ -179,11 +186,13 @@ namespace armarx::skills::gui
                 createdAronList->addElement(convVisitor.createdAron);
             }
         }
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::PairPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronPair = std::make_shared<aron::data::List>(i->getPath());
         createdAron = createdAronPair;
@@ -208,11 +217,13 @@ namespace armarx::skills::gui
                 createdAronPair->addElement(convVisitor.createdAron);
             }
         }
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::TuplePtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronList = std::make_shared<aron::data::List>(i->getPath());
         createdAron = createdAronList;
@@ -240,6 +251,7 @@ namespace armarx::skills::gui
                 createdAronList->addElement(v.createdAron);
             }
         }
+        
     }
 
     void
@@ -252,6 +264,7 @@ namespace armarx::skills::gui
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::MatrixPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdMatrix = std::make_shared<aron::data::NDArray>(i->getPath());
         int dataSize = 0;
@@ -276,6 +289,7 @@ namespace armarx::skills::gui
                 break;
         };
 
+        
         // UGLY HACK: FIX ME!!!
         switch (i->getElementType())
         {
@@ -308,6 +322,7 @@ namespace armarx::skills::gui
                 break;
         };
 
+        
         createdMatrix->setShape({i->getRows(), i->getCols(), dataSize});
         int totalByteSize = i->getRows() * i->getCols() * dataSize;
         createdAron = createdMatrix;
@@ -323,17 +338,21 @@ namespace armarx::skills::gui
             }
         }
 
-
+        
         auto* rootWidget = el->treeWidget();
         ARMARX_CHECK(rootWidget);
         auto* widget = rootWidget->itemWidget(el, 1);
+        ARMARX_CHECK(rootWidget);
         auto* matrixWidget = EditMatrixWidget::DynamicCastAndCheck(widget);
+        ARMARX_CHECK(matrixWidget);
 
         handleErrors(matrixWidget->hasParseErrors());
         if (matrixWidget->hasParseErrors())
         {
             return;
         }
+
+        
         // write to aron data
         std::vector<unsigned char> elems;
         elems.reserve(totalByteSize);
@@ -349,11 +368,13 @@ namespace armarx::skills::gui
             }
         }
         createdMatrix->setData(totalByteSize, elems.data());
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::QuaternionPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdQuat = std::make_shared<aron::data::NDArray>(i->getPath());
         createdAron = createdQuat;
@@ -390,6 +411,7 @@ namespace armarx::skills::gui
                 << "serialized quaternions did not return byte sequence of correct length!";
         }
         createdQuat->setData(serialized.size(), serialized.data());
+        
     }
 
     void
@@ -409,6 +431,7 @@ namespace armarx::skills::gui
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::IntEnumPtr& i)
     {
+        
         ARMARX_TRACE;
         QTreeWidgetItem* el = parentItem->child(index);
 
@@ -433,11 +456,13 @@ namespace armarx::skills::gui
         std::tie(success, createdAron) = intEnumWidget->parseToAron();
 
         handleErrors(!success);
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::IntPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronInt = std::make_shared<aron::data::Int>(i->getPath());
         createdAron = createdAronInt;
@@ -472,11 +497,13 @@ namespace armarx::skills::gui
             return;
         }
         handleErrors(false);
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::LongPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronLong = std::make_shared<aron::data::Long>(i->getPath());
         createdAron = createdAronLong;
@@ -510,11 +537,13 @@ namespace armarx::skills::gui
             return;
         }
         handleErrors(false);
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::FloatPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronFloat = std::make_shared<aron::data::Float>(i->getPath());
         createdAron = createdAronFloat;
@@ -547,11 +576,13 @@ namespace armarx::skills::gui
             return;
         }
         handleErrors(false);
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::DoublePtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronDouble = std::make_shared<aron::data::Double>(i->getPath());
         createdAron = createdAronDouble;
@@ -584,11 +615,13 @@ namespace armarx::skills::gui
             return;
         }
         handleErrors(false);
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::BoolPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronBool = std::make_shared<aron::data::Bool>(i->getPath());
         createdAron = createdAronBool;
@@ -621,16 +654,23 @@ namespace armarx::skills::gui
             return;
         }
         handleErrors(false);
+        
     }
 
     void
     AronTreeWidgetConverterVisitor::visitAronVariant(const aron::type::StringPtr& i)
     {
+        
         ARMARX_TRACE;
         auto createdAronString = std::make_shared<aron::data::String>(i->getPath());
         createdAron = createdAronString;
         QTreeWidgetItem* el = parentItem->child(index);
 
+        if (el == nullptr)
+        {
+            return;
+        }
+
         if (i->getMaybe() != armarx::aron::type::Maybe::NONE)
         {
             // its a maybetype. We have to check the state
@@ -643,6 +683,7 @@ namespace armarx::skills::gui
 
         std::string str = el->text(1).toStdString();
         createdAronString->setValue(str);
+        
     }
 
     void
diff --git a/source/RobotAPI/libraries/skills_gui/aron_tree_widget/visitors/AronTreeWidgetSetter.cpp b/source/RobotAPI/libraries/skills_gui/aron_tree_widget/visitors/AronTreeWidgetSetter.cpp
index 77887a000c8c5b7dddf955ba8eadeb1ec39b43ec..a9f7e4db55e3e90abcd02bf29e4d4e8c3527b4f6 100644
--- a/source/RobotAPI/libraries/skills_gui/aron_tree_widget/visitors/AronTreeWidgetSetter.cpp
+++ b/source/RobotAPI/libraries/skills_gui/aron_tree_widget/visitors/AronTreeWidgetSetter.cpp
@@ -35,11 +35,12 @@ template <typename T>
 std::string
 usString(T number, size_t precision = 3)
 {
+    
     std::stringstream ss;
     const char* locale = "C";
     ss.imbue(std::locale(locale));
-
     ss << std::fixed << std::setprecision(precision) << number;
+    
     return ss.str();
 }
 
@@ -102,6 +103,7 @@ namespace armarx::skills::gui
     void
     AronTreeWidgetSetterVisitor::visitAronVariant(const aron::data::DictPtr& i)
     {
+        
         // either it is the root or it has a name
         if (i->getPath().size() == 0 ||
             checkTreeWidgetItemForSimilarName(i->getPath().getLastElement()))
@@ -126,11 +128,13 @@ namespace armarx::skills::gui
                 el->setCheckState(2, Qt::CheckState::Checked);
             }
         }
+        
     }
 
     void
     AronTreeWidgetSetterVisitor::visitAronVariant(const aron::data::ListPtr& i)
     {
+        
         if (checkTreeWidgetItemForSimilarName(i->getPath().getLastElement()))
         {
             AronTreeWidgetItem* el = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
@@ -161,6 +165,7 @@ namespace armarx::skills::gui
                 el->setCheckState(2, Qt::CheckState::Checked);
             }
         }
+        
     }
 
     void
@@ -168,6 +173,7 @@ namespace armarx::skills::gui
                 const std::shared_ptr<armarx::aron::type::Matrix>& matrixType,
                 const aron::data::NDArrayPtr& arr)
     {
+        
         auto elemType = matrixType->getElementType();
         auto* rawData = arr->getData();
         // string can convert any item
@@ -250,6 +256,7 @@ namespace armarx::skills::gui
                     std::shared_ptr<armarx::aron::type::Quaternion>& quatType,
                     const aron::data::NDArrayPtr& arr)
     {
+        
         auto elemType = quatType->getElementType();
         auto rawData = arr->getData();
         auto shape = arr->getShape();
@@ -280,11 +287,13 @@ namespace armarx::skills::gui
         {
             quatWidget->setText((QuaternionWidget::QuaternionComponents)i, toString(i));
         }
+        
     }
 
     void
     AronTreeWidgetSetterVisitor::visitAronVariant(const aron::data::NDArrayPtr& arr)
     {
+        
         // Matrices are handled as NDArray. Raw ndarrays cannot be created currently
         auto* el = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
         ARMARX_CHECK(el);
@@ -315,11 +324,13 @@ namespace armarx::skills::gui
         {
             el->setCheckState(2, Qt::CheckState::Checked);
         }
+        
     }
 
     void
     AronTreeWidgetSetterVisitor::visitAronVariant(const aron::data::IntPtr& i)
     {
+        
         if (checkTreeWidgetItemForSimilarName(i->getPath().getLastElement()))
         {
             AronTreeWidgetItem* el = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
@@ -341,11 +352,13 @@ namespace armarx::skills::gui
                 el->setCheckState(2, Qt::CheckState::Checked);
             }
         }
+        
     }
 
     void
     AronTreeWidgetSetterVisitor::visitAronVariant(const aron::data::LongPtr& i)
     {
+        
         if (checkTreeWidgetItemForSimilarName(i->getPath().getLastElement()))
         {
             AronTreeWidgetItem* el = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
@@ -356,6 +369,7 @@ namespace armarx::skills::gui
                 el->setCheckState(2, Qt::CheckState::Checked);
             }
         }
+        
     }
 
     void
@@ -364,18 +378,21 @@ namespace armarx::skills::gui
         if (checkTreeWidgetItemForSimilarName(i->getPath().getLastElement()))
         {
             AronTreeWidgetItem* el = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
-            el->setText(1, QString::fromStdString(usString<float>(i->getValue())));
-
+            std::string repr = usString<float>(i->getValue());
+            QString qstr = QString::fromStdString(repr);
+            el->setText(1, qstr);
             if (el->aronType && el->aronType->getMaybe() != armarx::aron::type::Maybe::NONE)
             {
                 el->setCheckState(2, Qt::CheckState::Checked);
             }
         }
+        
     }
 
     void
     AronTreeWidgetSetterVisitor::visitAronVariant(const aron::data::DoublePtr& i)
     {
+        
         if (checkTreeWidgetItemForSimilarName(i->getPath().getLastElement()))
         {
             AronTreeWidgetItem* el = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
@@ -386,11 +403,13 @@ namespace armarx::skills::gui
                 el->setCheckState(2, Qt::CheckState::Checked);
             }
         }
+        
     }
 
     void
     AronTreeWidgetSetterVisitor::visitAronVariant(const aron::data::BoolPtr& i)
     {
+        
         if (checkTreeWidgetItemForSimilarName(i->getPath().getLastElement()))
         {
             AronTreeWidgetItem* el = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
@@ -401,11 +420,13 @@ namespace armarx::skills::gui
                 el->setCheckState(2, Qt::CheckState::Checked);
             }
         }
+        
     }
 
     void
     AronTreeWidgetSetterVisitor::visitAronVariant(const aron::data::StringPtr& i)
     {
+        
         if (checkTreeWidgetItemForSimilarName(i->getPath().getLastElement()))
         {
             AronTreeWidgetItem* el = AronTreeWidgetItem::DynamicCast(parentItem->child(index));
@@ -416,6 +437,7 @@ namespace armarx::skills::gui
                 el->setCheckState(2, Qt::CheckState::Checked);
             }
         }
+        
     }
 
     void