Hi,When adding entities to a collection, did you do the following:Get the latest entity HREFThis will prevent adding a deleted or an outdated entityBefore adding the entity to a collection, get the current collection's contentElement first and append (or prepend) the new entity to the listThis will prevent deleting any existing entities in the list, users are in charge of keeping the persistence of the dataThis "unknown" entity might've been a deleted entity that you are trying to reference. If ...

Hi,Is the project that you set up a 1 top-level nav collection or 2 top-level nav collection? I am assuming that it is the latter. You can find out by going to the Project Settings rail > select the project > edit > go to App Navigation tab.If so, please update the $collection_home_name variable (located in 20150810-DPS-Content Producer Service API-Examples/demo/demo_parameters.php) to either one of the following:$collection_home_name = "topLevelTabletContent"; // for tablet collection$collectio...

Hi,The function that controls the order of the entities within a collection is located in /class/collection.php, updateContetnElements(). By default, it is doing this: // iterate through the new list of entities foreach($this->contentElements as $contentElement) { // append each entity to the end of the existing list of entities $data[] = array( 'href' => $contentElement ); }$data contains the existing list of entities (can be empty), and $this->contentElements have the newly added list of entit...