Issue with Citrix Licensing 11.9

The Citrix License Server might crash immediately after startup. This issue is something Citrix is aware of. http://support.citrix.com/proddocs/topic/licensing-119/lic-about-11-9.html

I have seen this issue in a Citrix XenDesktop 5.5 environment and Citrix XenApp 6.5 Environment.

Workaround:
Delete the c:\program files\citrix\licensing\ls\conf\ activation_state.xml and concurrent_state.xml files and then start the license server.

These files are automatically regenerated when the license server starts.