ORA-29283解决方法（impdp）
impdp报错信息如下
ORA-39002: invalid operation
ORA-39070: Unable to open the log file.
ORA-29283: invalid file operation
ORA-06512: at "SYS.UTL_FILE", line 475
ORA-29283: invalid file operation
根据ORA-29283的提示，发现是directory的目录有问题，选择正确的目录，impdp成功!
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