unable to read trailer block 0xff

Hello, I have a problem. if i make a clone Mifare Classic, this clone after i want read with mfoc (0.10.2) and libnfc (1.4.2) so i write nfc-mfclassic r a xxx.mfd keysxxx.mfd .. and next is error :
Error: unable to read trailer block 0xff
nfc_initiator_transceive_bytes: Timeout
!
Error: unable to read block 0xfe

Why libnfc dont read block 0xfe?? Is problem with wrong version of mfoc or libnfc ?? Or is problem with different UID after write on blank card. I used Touchatag  and mifare classic s70. Please help mi.