On 07/11/2019 01:30, Norbert Preining wrote: > On Wed, 06 Nov 2019, Joseph Wright wrote: >> chemformula >> - units >> - nicefrac > > nicefrac is not a package, but contained in units. > > Thanks for the lists > > Norbert Drat: I'd noticed that, put in units, must have forgotten to remove the first 'guess'. Joseph