Error: FlexLM error 1.5.-18

Nov 1, 2014


When you launched the product on a client machine, the product failed to start and the following error message was displayed. 

FlexLM error 1.5.-18

The license manager shows that licenses are available for the correct product and version.



This error can occur if permissions are not set correctly for the following registry key: 

HKEY_LOCAL_MACHINE\Software\FLEXlm License Manager

Users running the application will need at least Read rights to this registry key.

For more information about adjusting registry permissions, please contact your System Administrator.

Warning! Problems caused by improperly editing the Windows registry could render your computer operating system unusable. Microsoft provides a wealth of critical information that you need to know about the registry in the Microsoft Knowledge Base at

Use the Microsoft® Registry Editor only at your own risk and only after backing up the registry as well as the system.dat and user.dat files as outlined for your operating system in the Microsoft Knowledge Base. Additional information about the registry is also contained in the Help topics in the Microsoft Registry Editor.