ORA-01157: cannot identify/lock data file 202 - see DBWR trace file ORA-01110: data file 202: '+DG_DATA/aup/tempfile/temp.307.773359701'

Hi

I´m trying to update the portal to SP 08, I ran SUM and in the requierement checks I obtain this error

Could not execute DMT command runhandler. See previous messages. Could not check the DB free space in the temporary tablespace due to problems with the database connectivity. com.sap.sql.exception.OpenSQLException: ORA-01157: cannot identify/lock data file 202 - see DBWR trace file ORA-01110: data file 202: '+DG_DATA/aup/tempfile/temp.307.773359701' OpenSQLExceptionCategories: [] java.sql.SQLException: ORA-01157: cannot identify/lock data file 202 - see DBWR trace file ORA-01110: data file 202: '+DG_DATA/aup/tempfile/temp.307.773359701'

I check the SUM log CHECK-JDBC-DRIVER_01.LOG and see this

<!--LOGHEADER[START]/-->

<!--HELP[Manual modification of the header may cause parsing problem!]/-->

<!--LOGGINGVERSION[2.0.7.1006]/-->

<!--NAME[/usr/sap/trans/SUM4/SUM/sdt/log/SUM/CHECK-JDBC-DRIVER_01.LOG]/-->

<!--PATTERN[CHECK-JDBC-DRIVER_01.LOG]/-->

<!--FORMATTER[com.sap.tc.logging.TraceFormatter(%d [%6s]: %m)]/-->

<!--ENCODING[UTF8]/-->

<!--LOGHEADER[END]/-->

Jun 27, 2013 3:40:21 PM [Info  ]: Checking version of jdbc driver /oracle/client/10x_64/instantclient/ojdbc6.jar.

and no more info, could you please help me with this issue???

Best Regards