I had same problem and here is repsonse and solution from SmartBear :
The cause of the problem is that the characters from the
second part of the ASCII table in Name Mapping properties corrupt the Name
Mapping file when migrating to TestComplete 9.
To get rid of the problem, our developers gave me the
steps below and I followed them to restore your Name Mapping file:
1. Open the Name Mapping file via Notepad (I used
Notepad++ - you can find it here: http://notepad-plus-plus.org/).
2. Find the following string: "Error: get
property" (without quotes).
3. Delete all characters after the "Error: get
property" string and before "/>.
4. Repeat steps 2 and 3 until you replace all wrong
characters.
So, if you face the same problem again, please follow the
steps above.