Done a bit of Googling but can’t find the answer, is there any reason why as to why the Spotlight function in Xojo would fail with an OutOfBounds exception?
The code in question is below and it fails on the first and every single item after 
query = New SpotlightQuery( "kMDItemFSName == '" + nameWithoutExtension + "*'" + _
" && kMDItemContentTypeTree == ""public.image""" )
query.Synchronous = True
query.Run