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This is an odd problem does it do this even after you reload the OS so ndless isn't running?
After installing 3.0.1 with boot2 3.x, the calculator can be downgraded to boot2 1.1 or 1.4 through the RS232 port, and therefore OS 1.1-2.1 remain usable. Check critor's tutorial for more information.After installing 3.0.2 with boot2 3.x, the calculator can be downgraded to boot2 1.1 or 1.4 through the RS232 port... but OS 3.0.2 set the anti-downgrade protection to refuse OS versions older than 3.0.2. And there's no equivalent of Nleash for OS 3.0.2...