update firmware problem

i have a problem with my Tektronix TDS2012B i have firmware v22.01 and i want to update it to v22.16 after i follow the instructions it tell me that "the oscilloscope firmware update failed .please cycle power and try again if updates continue to fail .refer to a qualified service technician or contact your local Tektronix service office" 
i used 2GB FAT32 USB flash drive 
can any one help ?

I have a TDS2024B oscilloscope and have the same issue. I thought the problem was that I was trying to go from v22.02 to v22.16 without the v22.11 in between. I received the v22.11 firmware from Tek (unfortunately, that also failed for me) but I'm attaching here in case you want to try it. They said that most likely something in the oscilloscope had become corrupted in the process of trying the firmware update and that I would need to send it in for repairs.