This error can after you have attempted to patch:
An out of date version of the game (such as when installing from the CD without applying the final Dynamix update).
A corrupt or non-standard installation.
The patch requires version 25034 of Tribes 2, which is included in the full download above. If you're installing from the original 2001 release CD, you must install this update before attempting to install TribesNext. If you have already attempted patching an out-of-date installation, it is recommended you completely uninstall the game and start over.
If your installation or media is damaged, it is recommended you use the full installer available above.