Hello everyone ;) I do get the following error regarding task queues and I am not sure why The message of the error is Failed to retrieve next task from task queue 'SGVirusScan.TQ_SaveWithAPIScan': An exception has occurred for the following request(s): InternalXPathTextGetRequest (depth = 0, amount = 1): //System.QueuedTask[QueueId=$queueId and Status='Idle' and ThreadId=empty and (StartAt<='[%CurrentDateTime%]' or StartAt=empty)] The stacktrace is com.mendix.connectionbus.ConnectionBusRuntimeException: An exception has occurred for the following request(s): InternalXPathTextGetRequest (depth = 0, amount = 1): //System.QueuedTask[QueueId=$queueId and Status='Idle' and ThreadId=empty and (StartAt<='[%CurrentDateTime%]' or StartAt=empty)] at com.mendix.connectionbus.RequestAnalyzer.doRequest(RequestAnalyzer.scala:35) Caused by: com.mendix.connectionbus.ConnectionBusRuntimeException: Connection is invalid, but it is subject of a transaction. at com.mendix.connectionbus.connections.jdbc.JdbcDataStore.closeConnectionImmediately(JdbcDataStore.scala:512) at com.mendix.connectionbus.connections.jdbc.JdbcDataStore.handleConnectionError(JdbcDataStore.scala:218) at com.mendix.connectionbus.connections.jdbc.JdbcDataStore.execRetrieveQueries(JdbcDataStore.scala:171) at com.mendix.connectionbus.connections.jdbc.JdbcDataStore.retrieve(JdbcDataStore.scala:141) at com.mendix.connectionbus.retrieve.QueryRequestExecutor.executeQueriesForLocal(QueryRequestExecutor.scala:102) at com.mendix.connectionbus.retrieve.QueryRequestExecutor.executeQueries(QueryRequestExecutor.scala:34) at com.mendix.connectionbus.retrieve.QueryRequestExecutor.execute(QueryRequestExecutor.scala:26) at com.mendix.connectionbus.retrieve.DataStoreCaller.$anonfun$processOqlGetRequest$1(DataStoreCaller.scala:36) at scala.Option.map(Option.scala:242) at com.mendix.connectionbus.retrieve.DataStoreCaller.processOqlGetRequest(DataStoreCaller.scala:32) at com.mendix.connectionbus.retrieve.DataStoreCaller.$anonfun$getResult$1(DataStoreCaller.scala:26) at scala.collection.StrictOptimizedIterableOps.flatMap(StrictOptimizedIterableOps.scala:118) at scala.collection.StrictOptimizedIterableOps.flatMap$(StrictOptimizedIterableOps.scala:105) at scala.collection.immutable.ArraySeq.flatMap(ArraySeq.scala:35) at com.mendix.connectionbus.retrieve.DataStoreCaller.getResult(DataStoreCaller.scala:26) at com.mendix.connectionbus.retrieve.GetRequestHandler.doOtherRequests(GetRequestHandler.scala:69) at com.mendix.connectionbus.retrieve.GetRequestHandler.doRequest(GetRequestHandler.scala:29) at com.mendix.connectionbus.RequestAnalyzer.doRequest(RequestAnalyzer.scala:30) at com.mendix.connectionbus.ConnectionBusImpl.doRequest(ConnectionBusImpl.scala:474) at com.mendix.modules.queue.TaskQueue.claimTasks(TaskQueue.scala:306) at com.mendix.modules.queue.TaskQueue.$anonfun$acquire$1(TaskQueue.scala:134) at com.mendix.logging.impl.LogManager.suppressLogMessagesInThreadBelow(LogManager.java:49) at com.mendix.modules.queue.TaskQueue.acquire(TaskQueue.scala:117) at com.mendix.modules.queue.TaskDispatcher.acquireTasks(TaskDispatcher.scala:183) at com.mendix.modules.queue.TaskDispatcher.poll(TaskDispatcher.scala:153) at com.mendix.modules.queue.TaskDispatcher.$anonfun$pollThread$1(TaskDispatcher.scala:45) at java.base/java.lang.Thread.run(Unknown Source) This happens for multiple task queues that are running on my system. I am not sure why. Thanks, Marcian :)