Rover 20 NC410

[Mistral150]

HI !
We are trying to reinstall the sftware on Rover 20 NC410 with software 4.24 but when reading files we get reading errors on all files read by the floppy.
Is the sotware corrupted and is it possible to get the software to download somewhere ?

Thank you.

[Mistral150]

We did reformat but after, error PLC 9121 shows without knowing what to do .