How to solve Xprog Unknown command. Software error

Xprog error: Unknown command. Software error
Solution: exchange your Xprog CPU with a new chip

Tools you need:

A working Xprog-m programmer

A high-quality Atmega64 repair chip

Note: you need different Atmega64 repair chips for different xprog versions you wanna update to.

XPROG-M CPU Atmega64 Repair Chip for XPROG-M V5.50 Update

ATMEGA64 Repair Chip Update XPROG-M from V5.0/V5.3 /V5.45 toV5.50 Full Authorization (Incl. CAS4)

ATMEGA64 Repair Chip Update XPROG from V5.0 to V5.45

ATMEGA64 Repair Chip Update XPROGfrom V5.0/V5.3/V5.45/V5.50 to V5.55 Full Authorization (Incl. CAS4) with Stable Software

The chip for the newest Xprog v5.70 and v5.60 is not available now.

It can be got with Xprog programmers only!

Xprog v5.70 here:

http://www.obdexpress.co.uk/wholesale/x-prog-box-ecu-programmer-x-prog-m.html