While downloading Dell Updates through the SMA (Kace System Management Appliance), the following error occurred in the logs:
[Mon Jun 5 10:56:04 PDT 2017] [notice] KDellUpdater - Starting...
[Mon Jun 5 10:56:05 PDT 2017] [notice] KDellUpdater - DellUpdates info up-to-date.
[Mon Jun 5 10:56:05 PDT 2017] [notice] KDellUpdater - Checking Dell Server Update Catalog
[Mon Jun 5 10:56:06 PDT 2017] [notice] KDellUpdater - Catalog info up-to-date.
[Mon Jun 5 10:56:06 PDT 2017] [notice] KDellUpdater - Checking Dell Client Update Catalog
[Mon Jun 5 10:56:08 PDT 2017] [notice] KDellUpdater - Extracting catalog...
[Mon Jun 5 10:56:10 PDT 2017] [notice] KDellUpdater - Loading catalog...
[Mon Jun 5 11:06:42 PDT 2017] [notice] KDellUpdater - Verifying packages...
PHP Fatal error: Call to undefined function _unlink() in /kbox/kboxwww/include/DellPackage.class.php on line 1406
[2017-06-05 11:06:42 -0700] PHP Error: Call to undefined function _unlink() in /kbox/kboxwww/include/DellPackage.class.php on line 1406
The Dell Update download failed and all the drivers are not downloaded into the appliance.