HP E4418B Programming Manual page 310

SENSe Subsystem
[SENSe[1]]|SENSe2:AVERage:COUNt:AUTO <Boolean>|ONCE
Error Message
If [SENSe[1]]|SENSe2:AVERage:COUNt:AUTO is set to ON while
[SENSe[1]]|SENSe2:SPEed is set to 200, the error -221, "Settings
Conflict" occurs. However, automatic averaging is enabled but the
[SENSe[1]]|SENSe2:AVERage:STATe command is not automatically
set ON.
HP E4418B/E4419B Programming Guide 9-9