Infratec 1255 error code

I've bought a used Infratec 1255 at auction and the accompanying floppy disks have been damaged and can't be read anymore. Error message is "OSI-B10 Stage 2 error no load.asc file". How to get around of this? Is software for this machine still available? FOSS says it's obsolete and no longer supported by them.

Thanks,

Nico