Two things I've seen: 1) A BbDevMgr process is running from a simulator that has to get killed first, and 2) internal library change in your code requiring you first to delete it from the device using JavaLoader.exe.
I'm doing my dev. on Eclipse tho so YMMV.
Originally Posted by maltin
I'm having the same issue and have tried reinstalling without any luck...has anyone else had the same problem and managed to work out what's failing?