ColdFusion 11 : Error accessing websocket page in CF Admin

Hi,

I would like to use the websocket functionalities in our CF11 server but i have an error when i want to access the websocket page in the CF Admin. I have the following error :

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The system has attempted to use an undefined value, which usually indicates a programming error, either in your code or some system code.

Null Pointers are another name for undefined values.

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Any ideas to solve this?

Our system is :

ColdFusion 11 version 11,0,19,314546 Edition Enterprise (latest update)

It runs on Linux and we are using Apache as web server.

Thank you very much for your answers and help.

Sylvain Langevin

HEC Montréal