For £-Device, refer to HELP (Help > Simulator > Device Reference > £-Device), only CAPVDD and CAPVSS can be found in Instance Parameters, CAPVDD2 and CAPVSS2 do not exist. A warning is generated as they are unknown instance parameters.
My mistake. Total 3 parameters CAPVDD2, CAPVSS2 and UVLO2 will return warning.
CAPVDD2, CAPVSS2, and UVLO2 were for an older version of the dual gate driver device. They will be removed from the help file.