An internal error was found in the SAP lock management system when opening

Hello SDN Experts ,

When i am trying to open any t-ocde in my productive system

it is displaying an error message "An internal error was found in the SAP lock management system " , not only for me but also for all the users .

Could please tell me what colud be the problem and solution for this??

it's very urgent .....

Thanks in Advance !

Siva reddy