STATUS_PRELOADER_INVALID(0xC0030004)

[tcs]

I am trying to get a backup on a ZTE Blade A3 Prime phone, mt6761, using the WwR + SPFT video, build number Z5157VV1.0.0B11, Android 10. I created a scatter file with WwR but when attempting readback in SFPT I get STATUS_PRELOADER_INVALID error. The video shows length of 0x80000 but I have tried 0x80000 and 0x40000. I get the same result with EMMC_BOOT_1 and PGPT. I also tried a scatter file from a Z5157VV1.0.0B10 firmware with the same results. The download DA bar goes to 100% and stays red and the bar underneath says 232.67K. Is it possible that ZTE has started using authentication with this build? Other people with earlier builds have said they were successful. How can I tell if this is a VCOM driver problem, authentication problem or scatter file problem?

[X3non]

I am trying to get a backup on a ZTE Blade A3 Prime phone, mt6761, using the WwR + SPFT video, build number Z5157VV1.0.0B11, Android 10. I created a scatter file with WwR but when attempting readback in SFPT I get STATUS_PRELOADER_INVALID error. The video shows length of 0x80000 but I have tried 0x80000 and 0x40000. I get the same result with EMMC_BOOT_1 and PGPT. I also tried a scatter file from a Z5157VV1.0.0B10 firmware with the same results. The download DA bar goes to 100% and stays red and the bar underneath says 232.67K. Is it possible that ZTE has started using authentication with this build? Other people with earlier builds have said they were successful. How can I tell if this is a VCOM driver problem, authentication problem or scatter file problem?

see https://www.hovatek.com/forum/thread-439.html ; search the list for "preloader_invalid" then try the fix for backup procedure

[tcs]

I was able to do a readback after pressing ctrl alt v to enter Advanced Mode and select SRAM instead of DRAM.