When restarting the Citrix Monitor services on the Citrix Delivery Controller server, we get the following event; Event ID 1013; "Initial database housekeeping failed with : System.NullReferenceException: Object reference not set to an instance of an object."

A private fix for LC6438 is available for DDC 7.11, 7.12 and 7.13. Public fix for this issue is integrated in 7.14 Current Release.

Fix: Check the object is valid before accessing its member function.

Additional Reference:

Fixed issues
http://docs.citrix.com/en-us/xenapp-and-xendesktop/7-14/whats-new/fixed-issues.html

After restarting the Citrix Monitoring Service or the Citrix Delivery Controller, event id 1013 might appear:

"Initial database housekeeping failed with: System.NullReferenceException: Object reference not set to an instance of an object."

The issue occurs when the Citrix Monitor Service is stopping.

[#LC6438]

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Problem Cause

In service stopping, the object may have already been disposed.