what tftp server you has used? try tftpd32 or 64there is reboot after 50% of upload update.img
did you make import / export on same version ? if so, why you did it?When export cameras to backup(encrypted), and import that backup (encrypted),
it normal!Inicialy i have only encrypted camera backup exported from old firmware, when i imported it on new firmware-error.
can you make a video record of this operation?So i maked cameras config and exported encrypted camera backup on new firmware, then imported -error.