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UpLoad E2Prom to File & DownLoad File to E2Prom

For some reason when I try to download a file that I have previously uploade from the E2Prom, I get an unhandled exception.  If I Select "Display File" it appears that 16-byte line numbers have been added to the data (no 'Address Visiable' check mark).  The line numbers show up diagonally through the data in the display.  I am pulling my hair out!    Any suggestions would be much appreciated.