For any kind of operation in brom mode with dft tool: read information, backup nvram...etc, a preloader image file is required by the tool. using the original preloader image file will again show the same problem in the previous attached image.spflashtool firmware upgrade flash operation ? nv backup data formatt +downloadl firmware dftpro .
thx for efforts. I already did the exact thing you did, but it didn't work for me. stuck 100% DA and no actual download happens