Hi Arijit Das,
Please referer to SAP Note 2009428 - Error:"No network connection...retrieve data" seen when viewing the dashboards based on web services on the iPad.
***************
Cause
dswsbobje needs to be deployed on the mobile server as we cannot access the URL: "http://mobileServer:port/dswsbobje"
This is due to the fact that 'dswsbobje' is not deployed on the application server where mobile service resides.
Resolution
Deploy dswsbobje on the mobile server.
1) Stop Tomcat.
2) First, deploy dswsbobje on mobile Tomcat servers using below command-line:
<wdeploy_folder>wdeploy tomcat7 -DAPP=dswsbobje deploy
3)Start Tomcat.
4) Check that you are able to access dswsbobje using: http:/localhost:8080\dswsbobje on Mobile server.
See Also
1608960 - How to deploy war files in BusinessObjects BI 4.x using the wdeploy command line utility
***************
I hope it helps.