I intend to use it! So, yes, I had not used it at this point, and your 
explanation now makes sense.

In the test example I have, I have now placed a line:  \ss My text, and 
I see that it now loads the sans serif font. But can you explain why it 
loads the math font, given that I have not, as yet, used that anywhere 
(and may not - it is there for insurance in case such a glyph is needed)?

Julian

On 26/8/20 11:58 am, Aditya Mahajan wrote:
> On Wed, 26 Aug 2020, jbf wrote:
>
>> Can someone tell me why, when I define my typefaces as follows below, I get:
>>
>> mkiv lua stats  > loaded fonts: 2 files: baskervaldadfstd.otf,
>> texgyrepagella-math.otf
>>
>> when in fact my font definitions are:
>>
>> \definefontfamily [mainface] [rm] [baskervaldadfstd]
>> [tf=file:BaskervaldADFStd.otf]
>> \definefontfamily [mainface] [ss] [librisadfstd]
>> [tf=file:LibrisADFStd-Regular.otf]
>> \definefontfamily [mainface] [mm] [TeX Gyre Pagella Math]
>>
>> \setupbodyfont[mainface]
>>
>> ---------------------
>>
>> ConTeXt loads the [rm] and the [mm] but not the [ss]. Be assured that
>> the ss typeface is available. So if, for example, I comment out the
>> first line ([rm]) and change the Libris to rm instead, I am told:
>>
>> mkiv lua stats  > loaded fonts: 2 files: librisadfstd-regular.otf,
>> texgyrepagella-math.otf
>>
>> In other words, only two, not three definitions are working at any one
>> time. Or is it not accepting [ss] for some reason regardless? I have
>> tried any number of existing sans serif fonts and none of them will
>> load. I know the family names are correct, so that is not the problem.
>> What could I be doing wrong?
> Are you actually using sans serif text in your document? If not, then context has no reason to embed a subset of it in the PDF. It is the same reason by the teletype [tt] font has not been loaded.
>
> Aditya
>
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