Cost Manager keeps stopping

I am not sure if I should put this issue in this forum or the cost management forum. For two days in a row, we are having issue with the cost manager stopping.

Log shows the following:

+---------------------------------------------------------------------------+
Start of log messages from FND_FILE
+---------------------------------------------------------------------------+
CST_CostProcValidation_PVT.Validate_Transactionsdebug updated rows: 0
+---------------------------------------------------------------------------+
End of log messages from FND_FILE
+---------------------------------------------------------------------------+

+---------------------------------------------------------------------------+
Current system time is 16-JAN-2013 03:56:51

+---------------------------------------------------------------------------+
APP-FND-01564: ORACLE error 12545 in AFPCOA

Cause: AFPCOA failed due to ORA-12545: Connect failed because target host or object does not exist
.

The SQL statement being executed at the time of the error was:  and was executed from the file .