'Import Standard Purchase Order' request goes in error

Hi,

We are facing error while import standard purchase order. In log file,we received below error message-

**Starts**09-MAR-2017 11:01:35

**SQL error and free**09-MAR-2017 11:01:38

ORACLE error 6510 in FDPSTP

Cause: FDPSTP failed due to ORA-06510: PL/SQL: unhandled user-defined exception

ORA-06512: at "APPS.PO_PDOI_GRP", line 398

ORA-06512: at line 1

.

The SQL statement being executed at the time of the error was: SELECT R.Conc_Lo09-MAR-2017 11:01:38

+---------------------------------------------------------------------------+

Start of log messages from FND_FILE

+---------------------------------------------------------------------------+

To get the log messages for PDOI, please use the following id to query against FND_LOG_MESSAGES table:

AUDSID = 203661053

+---------------------------------------------------------------------------+

End of log messages from FND_FILE