Hi!
I try to program my NTAG424Dna using MIFAREdiscover program:
Hi ,
Hope you are doing great, the reason why this is happening is that you are not activating the tag into the ISO layers, you are trying to send a command but the tag needs to be activated into layer 3 then layer 4 of iso 14443, so in order to accomplish this please first send the activate idle command then the RATS + PPS, then try to select the DF name as usual, please check this post I answered for DESFire light, the procedure should be very simple from first step to step 2.6.
https://community.nxp.com/thread/516851
if you have more questions let us know.
Have a great day !
BR
Jonathan