https://community.qlik.com/t5/App-Development/Task-failing-on-slave-node-but-reloading-successfully-in-other/m-p/1516759#M36812 step 1. ping and telnet the SQL Server with the sql port (e.g. 1433) from all your qlik nodes. might be a firewall rule issue. Wed, 05 Dec 2018 13:11:59 GMT Anonymous 2018-12-05T13:11:59Z https://community.qlik.com/t5/App-Development/Task-failing-on-slave-node-but-reloading-successfully-in-other/m-p/1516666#M36808 <P>Hi,</P><P>We have a Qlik Sense app with a task that reloads the app on hourly basis.</P><P>We have noticed that the app fails to load when it is sent to certain nodes but is successful in other nodes.</P><P>What can be the cause of this issue? Is there a solution?</P><P>I use SQL Server ODBC connection for the app, I have checked and confirmed that the app is stable and there are not script items causing the error.</P><P>My analysis identifies that it is failing on certain slave-nodes but not on other nodes.</P><P>Anyone can help please?</P> Wed, 05 Dec 2018 10:11:45 GMT https://community.qlik.com/t5/App-Development/Task-failing-on-slave-node-but-reloading-successfully-in-other/m-p/1516666#M36808 jblomqvist 2018-12-05T10:11:45Z https://community.qlik.com/t5/App-Development/Task-failing-on-slave-node-but-reloading-successfully-in-other/m-p/1516759#M36812 step 1. ping and telnet the SQL Server with the sql port (e.g. 1433) from all your qlik nodes. might be a firewall rule issue. Wed, 05 Dec 2018 13:11:59 GMT https://community.qlik.com/t5/App-Development/Task-failing-on-slave-node-but-reloading-successfully-in-other/m-p/1516759#M36812 Anonymous 2018-12-05T13:11:59Z