What does the message "PowerLab load failed" mean?

If you run Chart 5 on your Computer and connect a 35 Series PowerLab to it you will see a warning message:
Reason for this is that the enabler, i.e. the PowerLab firmware, that is needed for that PowerLab did not ship with that version of Chart. The development of Chart 5 stopped before the 35 series PowerLab was developed.
Solution: use the PowerLab with the software version it was shipped with.