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Crash Application when I using QAbstractListModel as subclass to custom ListModel

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Hi everyone! I need help with QAbstractListModel. I develop application where I need show items as tree. I use QML component from here [qt-project.org]. I’ve created the model list object as subclass QAbstractListModel. All works fine, but when I try to change model to another model application calls crash. When items need to update I’m creating a new model object and send signal to QML component where I call this: Component.onCompleted: {  createNewController.updateDatas.connect(updateFields); }   function updateFields(obj) {  var list = createNewController.newItem.toPropertiesListModel();     console.log("ssss: "+list.getItem(0).path);  propertiesTable.model = list; }   TreeView {  id: propertiesTable  anchors.top: parent.top  width: parent.width  height: parent.height - 30  model: createNewController.newItem.toPropertiesListModel()       onModelChanged: {   removeSelectedProperty.enabled = (model !== null && model.length > 0);  }  onCurrentItemChanged: {   console.log("parentPath: "+currentItem.node.path);   propertiesSettingsPanel.propertyValue.text = currentItem.node.value;  } } Could you tell me when I can find samples about QAbstractListModel? Thanks!

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