Port 13 (the good port) lists on start up as 'port 13(nano 33 BLE)', but switches to simple port13 on attempts to load pgm which is rejected. Note: has worked ok up to now (with exception of port 14 intrusions.) This is not the sense board...
No experience with the BLE so can't help. But it would help if you posted the full error message instead of saying "is rejected" 
2 posts were split to a new topic: Nano33 IOT not working with com ports
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