User lacks privelege or object not found Alert while trying to read fields/ execute the select query in the jrxml report in Jaspersoft Studio 6.3

User lacks privelege or object not found Alert while trying to read fields/execute the select query in the jrxml report in Jaspersoft Studio 6.3

report.jrxml --> Design -->Data set and Query Editor Dialog -->Read Fields 

Displays the Error on Top : user lacks previlege or object not found

Note: Have provided the DB details in DATA ADAPTER , the select query from the report works fine in DB (SQL DEVELOPER), DB TYPE: ORACLE