\externalfigure[cat.pdf]
</context>
In MkIV, to see which files were searched, either add
\enabletrackers[graphics.inclusion]
or use the command line switch
context --trackers=graphics.inclusion
which gives
graphics > inclusion > locations: local,global
graphics > inclusion > path list: . .. ../..
graphics > inclusion > strategy: forced format pdf
graphics > inclusion > not found: cat.pdf
graphics > inclusion > not found: ./cat.pdf
graphics > inclusion > not found: ../cat.pdf
graphics > inclusion > not found: ../../cat.pdf
graphics > inclusion > format not supported: %s
indicating where the file was searched.
== Example ==