Hi Durga,
It worked locally only once , while re-testing and removing the option "Hide Error Message Window" we came to know the OLAP connection is not connection to source (Error:-Cannot connect to the OLAP source) also BW trace was blank.
Although we were getting data for some combination.
BO admin restarted all the servers (EOD) and the dashboards are now working fine.
But , the issue is still left open that why this behavior happening and its main cause is not identified.
We do have a maintenance every Sunday where Cache is cleared and BO servers are restarted.
I have raised the ticket with SAP (we need to have the trace file, which we can get by next Sunday only)