Thanks for reply.
As standalone commands it works. I was trying in interactive mode and it doesn't. (build from sources, v1.20)
$ src/lxi --version
lxi v1.20
$ src/lxi scpi -a 192.168.1.149 -i
Connected to 192.168.1.149
Entering interactive mode (ctrl-d to quit)
lxi> *IDN?
RIGOL TECHNOLOGIES,MSO1104Z,DS1ZDxxxxxxxx,00.04.04.SP3
lxi> :MEASure:ITEM? OVERshoot,CHANnel2
lxi>
$ src/lxi scpi -a 192.168.1.149 ":MEASure:ITEM? OVERshoot,CHANnel2"
2.306453e-02