Why ipmitool report "Error response 0xc1 from Get PICMG Properities" during dump BMC log

Phenomenon 

It will report "Error response 0xc1 from Get PICMG Properities" messages when user key-in following command to dump system BMC log, 

# ipmitool sel elist -v > test.log
Running Get PICMG Properties my_addr 0x20, transit 0, target 0
Error response 0xc1 from Get PICMG Properities
Running Get VSO Capabilities my_addr 0x20, transit 0, target 0
Invalid completion code received: Invalid command
Discovered IPMB address 0x0

Analysis

User can ignore  “these error message”,  these error messages mean “BMC receives  non-support parameters or command”.