Log Error Inin Primary Databse

Al Salamo Al3aykom ,

I have one issue i have RAc databse 2 nodes and one standby database in onther country

whem im checking the error in log file fro primary databse rac1 in bdump i have this error

{Errors in file /u01/app/oracle/admin/RAC1/bdump/rac11_arc0_17678.trc:
ORA-16055: Message 16055 not found; No message file for product=RDBMS, facility=ORA
ARCH: FAL archive failed. Archiver continuing
Mon Apr  8 13:16:45 2013
ORACLE Instance RAC11 - Archival Error. Archiver continuing.
Mon Apr  8 13:45:22 2013
ALTER SYSTEM ARCHIVE LOG
Mon Apr  8 13:45:22 2013
Thread 1 advanced to log sequence 197681 (LGWR switch)
  Current log# 1 seq# 197681 mem# 0: +DATA/rac1/onlinelog/group_1.261.669817535}

why this error ORA-16055