Worked perfectly thanks ...

i´m on Firmware: RepRapFirmware for Duet 2 Maestro 3.01-RC4 (2020-03-16b1)

I'm trying to upgrade the firmware on my maestro card but am getting the following error

M997 S0
Error: M997: In-application programming binary "DuetMaestroIAP.bin" not found