How to update sst data by OISST

[YH_wcj]

I want to use OISST data as my initial condition, but , the type of data is .nc file, I meet warning that:
WARNING: Couldn't open file oisst:2024-09-03_22 for input.
.....

part commend I execuate:
ln -sf ungrib/Variable_Tables/Vtable.SST Vtable
./link_grib.csh /sharedata/dataset/realtime/SD048-OSTIA/2024/*
./ungrib.exe
./metgrid.exe