Hi Alan,
That prompt was there to link to "local" files. However it turns out this is behavior not allowed by modern browsers. (ie it won't link to a file:// from inside a http:// ). So I've removed the prompt in 4.27.
However as long as your files are on the server, this isn't a problem.
Remembering that static files can _only_ be served from below the "web" folder, simply set the URL.
For example (and I'm not sure what you have in your file) but let's say you have a field, and it contains a web-relative filename.
cus:logo = 'images\frank.png'
then you can just tick on "Field contains URL".
What if the field contains more than that...
cus:logo = 'c:\server\web\images\frank.png'
then you'd need version 4.27 which simplifies this to
'images\frank.png'
for you.
What if the file is _outside_ the web folder?
In that case you have 2 options.
a) move the file _inside_ the web folder or
b) tweak the server to allow it to serve static files _outside_ the web folder. I really, really, don't recommend this though.
Cheers
Bruce