Recovery problem with PostgreSQL

While running the recovery process I am getting the following errors for cannot stat:

cp: cannot stat `/data1_node5/arch/00000001.history': No such file or
directory
cp: cannot stat
`/data1_node5/arch/000000010000000000000007.02C4C530.backup': No such
file or directory
cp: cannot stat `/data1_node5/arch/000000010000000000000007': No such
file or directory
2006-05-10 17:07:35 PDT LOG:  checkpoint record is at 0/1EC4C558
2006-05-10 17:07:35 PDT LOG:  redo record is at 0/1EC4C530; undo record
is at 0/0; shutdown FALSE
2006-05-10 17:07:35 PDT LOG:  next transaction ID: 1227111; next OID:
35682
2006-05-10 17:07:35 PDT LOG:  next MultiXactId: 168; next
MultiXactOffset: 338
2006-05-10 17:07:35 PDT LOG:  automatic recovery in progress
2006-05-10 17:07:35 PDT LOG:  redo starts at 0/1EC4C530
2006-05-10 17:07:35 PDT LOG:  record with zero length at 0/1EF5C91C
2006-05-10 17:07:35 PDT LOG:  redo done at 0/1EF5C8F4
cp: cannot stat `/data1_node5/arch/000000010000000000000007': No such
file or directory
2006-05-10 17:07:35 PDT LOG:  archive recovery complete
2006-05-10 17:07:35 PDT LOG:  database system is ready
2006-05-10 17:07:35 PDT LOG:  transaction ID wrap limit is 2147484188,

Any idea what can be causing these?

Regards,
Shoaib