Dear Wolfgang,

I sent an e-mail about problems with my simplefonts. I got no reply since my example had fonts that were probably not available to you. But the problem does not relate to the Gaelic fonts that I had been using. I am sending this file instead. The fonts below can be swapped about. The main font is always typeset as requested but the others are not. Am I doing something really silly? The readout from the console is below. I am using Context Minimals MarkIV on a Mac. Help would be appreciated.

Thanks,
Charlie 

  \usemodule[simplefonts] % load the module
  \setmainfont[TeX Gyre Adventor]


\starttext

Hello World

\blank[big]

\simplefont[TeX Gyre Heros]


\blank[big]

\simplefont[Zapfino]
Hello World


\stoptext

The argument "/Users/charlesdoherty/Documents/TestFolder/Untitled.tex" is not a valid TEXROOT path.
(There is no file "/Users/charlesdoherty/Documents/TestFolder/Untitled.tex/texmf/tex/plain/base/plain.tex")

mtx-context     | run 1: luatex --fmt="/Users/charlesdoherty/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/cont-en" --lua="/Users/charlesdoherty/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/cont-en.lui" --backend="pdf" "./Untitled.tex"
This is LuaTeX, Version beta-0.65.0-2010121316 
 \write18 enabled.
(Untitled.tex

ConTeXt  ver: 2011.02.25 22:03 MKIV  fmt: 2011.3.8  int: english/english

system          > cont-new.mkiv loaded
(/Users/charlesdoherty/context/tex/texmf-context/tex/context/base/cont-new.mkiv
system          > beware: some patches loaded from cont-new.mkiv
)
system          > Untitled.top loaded
(Untitled.top)
fonts           > latin modern fonts are not preloaded
languages       > language en is active
resolvers       > modules > loaded: 'simplefonts'
(/Users/charlesdoherty/context/tex/texmf-context/tex/context/third/simplefonts/t-simplefonts.tex
loading         > ConTeXt User Module / Simplefonts
<+ /Users/charlesdoherty/context/tex/texmf-context/tex/context/third/simplefonts/t-simplefonts.lua>)
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
fonts           > names > font database has matching configuration and file hashes
(/Users/charlesdoherty/context/tex/texmf-context/tex/context/base/type-siz.mkiv) (/Users/charlesdoherty/context/tex/texmf-context/tex/context/base/type-otf.mkiv){/Users/charlesdoherty/context/tex/texmf/fonts/map/dvips/lm/lm-math.map}{/Users/charlesdoherty/context/tex/texmf/fonts/map/dvips/lm/lm-rm.map}{/Users/charlesdoherty/context/tex/texmf-context/fonts/map/pdftex/context/mkiv-base.map}
system          > begin file Untitled.tex at line 5
backend         > xmp > using file '/Users/charlesdoherty/context/tex/texmf-context/tex/context/base/lpdf-pdx.xml'
pages           > flushing realpage 1, userpage 1, subpage 1
system          > end file Untitled.tex at line 20
 )</Users/charlesdoherty/context/tex/texmf/fonts/opentype/public/lm/lmromanunsl10-regular.otf></Users/charlesdoherty/context/tex/texmf/fonts/opentype/public/tex-gyre/texgyreadventor-regular.otf>
mkiv lua stats  > used config file          - selfautoparent:/texmf/web2c/texmfcnf.lua
mkiv lua stats  > used cache path           - /Users/charlesdoherty/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e
mkiv lua stats  > input load time           - 0.009 seconds
mkiv lua stats  > stored bytecode data      - 275 modules, 56 tables, 331 chunks
mkiv lua stats  > loaded tex modules        - 1 requested, 1 found (*-simplefonts), 0 missing
mkiv lua stats  > cleaned up reserved nodes - 33 nodes, 9 lists of 411
mkiv lua stats  > node memory usage         - 19 glue_spec
mkiv lua stats  > node list callback tasks  - 6 unique task lists, 5 instances (re)created, 4069 calls
mkiv lua stats  > used backend              - pdf (backend for directly generating pdf output)
mkiv lua stats  > loaded patterns           - en::2
mkiv lua stats  > callbacks                 - 4210 direct, 3743 indirect, 7953 total
mkiv lua stats  > randomizer                - resumed with value 0.83236534513178
mkiv lua stats  > lxml preparation time     - 0.000 seconds, 0 nodes, 15 lpath calls, 0 cached calls
mkiv lua stats  > result saved in file      - Untitled.pdf
mkiv lua stats  > loaded fonts              - 16 files: stmary10.afm lmmono10-regular.otf lmroman10-bold.otf lmroman10-regular.otf lmromanunsl10-regular.otf lmsans10-regular.otf texgyreadventor-regular.otf eufb10.tfm eufm10.tfm msam10.tfm msbm10.tfm lmex10.tfm lmmi10.tfm lmmib10.tfm lmsy10.tfm rm-lmr10.tfm
mkiv lua stats  > fonts load time           - 0.241 seconds 
mkiv lua stats  > luatex banner             - this is luatex, version beta-0.65.0-2010121316
mkiv lua stats  > control sequences         - 30184 of 165536
mkiv lua stats  > current memory usage      - 38 MB (ctx: 39 MB)
mkiv lua stats  > runtime                   - 0.886 seconds, 1 processed pages, 1 shipped pages, 1.129 pages/second

system          | total runtime: 1.175