There’s a folder _ \log\ _ at the location where you started the Update.exe from. Inside this folder, there are log files for each update procedure you started. In your case this is _E:_0UpdateTool6_0_17\log\ _.
Please send me the log file of the failing update process (when you got the UDLDoUpdate:NvFlashError' message). The log file will give me more detailed information about the error cause.
The log file shows the problem: file not found: edt800x480_OsImage2.nb0.
It seems that our file sharing site skipped the file because it is 0 bytes in size.
To solve the problem, simply generate an empty file with that name in the same folder as all the other backup files.
when the image backup edt800x480.* was successfully downloaded we are able to load our flashscreen. It looks like this image solved all our problem. I assume that the image resets all block configuration to factory default properly.
thanks for your support.