执行以下命令
expdp scott/tiger@orcl schemas=EMPLOYEES directory=DB_BAK dumpfile=SCOTT.dmp logfile=expdpSCOTT.log
获取此错误，当我执行导出架构的上述命令
时Export: Release 11.2.0.1.0 - Production on Wed Mar 12 12:16:05 2014
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
UDE-12170: operation generated ORACLE error 12170
ORA-12170: TNS:Connect timeout occurred
请帮忙。