Error while export through secure protocol(TCPS)

 Dear all,

      I export the following table though TCPS protocol. The table structure is as below.

Name             Type         Nullable Default Comments

---------------- ------------ -------- ------- --------

COL1             VARCHAR2(20)

COL2             DATE         Y

COL3             DATE         Y

COL4             DATE         Y

COL5             DATE         Y

COL6             DATE         Y

COL7             DATE         Y

COL8             DATE         Y 

COL9             DATE         Y

      By the following syntax

exp username/password@alias_name file=data.dmp  log=data.olog tables=table_name statistics=none constraints=n grants=n triggers=n      Then I've got the errors. Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
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