The dmp file 10g exported by oracle11g with the exp command cannot be recognized. There is a method on the Internet to modify the version number of the dmp file with notepad++ (I don’t know why it can’t be modified with editplus). After the modification is completed, it can be imported. It's all right, it's not clear what the shortcomings are, but a lot of mistakes are reported
In fact, the best way is to use the 10g client to connect to oracle11g and then use the exp command to export. The following is the method.
http://jingyan.baidu.com/article/29697b9137d421ab21de3c47.html