SAPNAMES File Locked

Hi Friends,

I tried to do a screen-exit for CJ01 and when i tried to activate the screen i am getting the following error.. What could be wrong?.

'An operating system file (the SAPNAMES file of user SSI1) could not be accessed from the program that is running, since it is locked by another transaction.

The name of the lock file is "E:\usr\sap\trans\tmp\SSI1.LOS".

Procedure

Execute the function again after a few seconds.

If the message occurs regularly, contact your SAP administrator.'

How to rectify this problem?

Quick replies would be suitably rewarded.

Thanks in advance.

Tamilarasan.L