Something is boogered with the software, possibly. Maybe a third-party app, or maybe the OS. Or maybe it's the theme if you are not using a stock theme.
If you are using an after-market theme, try switching to one of the themes that came installed on the device. And do another hard reset and wait a good two or three minutes. Do you still get the uncaught exception?
The security wipe doesn't format the device per se. It removes all user data. If you also select to remove third-party apps, it will do that, too.
Did you just do the simple wipe, or did you also select to remove third-party apps as well? If you can't get rid of the uncaught exception and you didn't wipe third-party apps, you might try repeating the security wipe but this time make that selection to delete the apps, then try again. Be sure and do a full backup before you do. Then add your apps back one at a time, and test in between.
If after all the above you still have trouble, I think it is time to prepare for wiping and reinstalling the OS. Or upgrade to the latest OS if you are using an older version. See the latest OS thread for your model. If you are looking at wiping, which you will have to do to resinstall the same version OS you have now, see the two articles at blackberryfaq.com on using JL_CMDER.