Mview refresh issue

Hi All,

 when refreshing this mview im getting this error,i have tried this with mview owner,sys,system but i can't get this refreshed..anyone can help me out? version is 11203 in linux

exec dbms_mview.refresh'mview_fin.MV_PS_VENDOR_WTHD','F');

ORA-01031: insufficient privileges

ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 364

ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 446

ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2563

ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2776

ORA-06512: at "SYS.DBMS_IREFRESH", line 685

ORA-06512: at "SYS.DBMS_REFRESH", line 195

ORA-06512: at line 1

Thanks!