Error In web UI

Hi All,

I came across following error in web UI most of the times, so can any one let me know the reason for this error & any solution for this ?

"There is not enough shared objects memory available to store data or internal management information. The error occurred while working with the instance "$DEFAULT_INSTANCE$" of the shared objects memory area "CL_CRM_GENIL_MODEL_SHM_AREA" in the client "800".

I have attached the error screen shot also.

Thanks in Advance,

Prafulla