Importing from 10g to 9i

I am trying to import a 10g dmp file into 9i and it is failing with ora-00010.

How to do this import?

Look in the back of the utilirties guide and it gives you information on compatibility between different database vertsions and imp/exp versions

i..e you can use a 10g export file on a 9i db unless you used the 9i exp