We have upgraded several systems from 4.5 PII to 6.0 PIV over the past few months. Through this we have noticed that ERR5575 doesn't appear when a 39xx set of older firmware is plugged in to let you know it needs new firmware. We have just been running the FSUM command in LD 32 every so often to determine if any sets needed upgrading. I don't see anything in Knowledge Base nor do I see any PEPs that mention this. Anyone else notice this or look into it?