I know my design only used standard cells from tsmc 28 hvt library, I checked that the library did get loaded OK:shiftreg4chipA __auto_cel_houston.<companyname>.com_33978.CEL
tcbn28hpmbwp35hvtss0p81v125c_ecsm (library) <path to>/tcbn28hpmbwp35hvtss0p81v125c_ecsm.db
and yet ICC complained the following:
The target library does not contain all required gates