World: r3wp

Here is what Carl has said:

Of course, not to discourage anyone, but we're going to be careful 
and choosy about what becomes part of R3. We've got our standards. 
We still value small, fast, and smart. REBOL is about getting great 
advantage and leverage from a well-designed tool, not about becoming 
yet another bloated and hard-to-manage computer language.

join foo/bar 'ton -- will try and evaluate foo/bar then append 'ton
join 'foo/bar 'ton -- will give you 'foo/bar/ton

That is great but also of no help if a word is holding the path
   'foo/bar
I was hoping the solution was in
   to-lit-word

path: 'foo/bar
join path 'ton ; ??

fails with 
  ** Script Error: Cannot use path on word! value

Hmm, works here.

to-path reduce[path 'word]   ; works OK but what a klunk

Only if the blocks are literaly embedded.
Could you try with the example
  t1
  t2

join to-path 't2 't1

no, in the example that I posted above :-)

>> t1: [a "one" b "two" c "three"]

>> t2: [f t1]

'f has no value so it is just like a functor
I am not askeing to be able to just use
   t2/f/a
with no further ado
I must build the path
   newPath: to-path reduce [ t2/f  'a]

is a pain ( and only because of how to-path is implemented;  to-lit-path 
is no more help as far as I can see at this hour

I'm not sure why -- newPath: join 't2/f 'a -- doesn't work...

Hold on, -- join to-path t2/f 'a --??

That just caused Rebol 2.6.3 to blow away
I did not send teh missuve to Microsoft that I was proffered

the missive

It works on 2.6.2 (Mac) 2.7.5 (Win)

let me fire up Rebo/View again

but how will this help me where I have a WORD that is holding that 
initial, partial, path ?

join to-path do path 'a

path: 't2/f
do join to-path do path 'a

;same error
>> t1: [a "one"]
== [a "one"]
>> t2: [f t1]
== [f t1]
>> pp: join 't2/f 'a
== t2/f/a
>> do pp
** Script Error: Cannot use path on word! value
** Where: halt-view
** Near: t2/f/a
>>

2.6.3 just ditched me again with that one ...

This is the limitation of evaluating paths.  'do does not evalute 
't1 when it is returned from 't2/f

I think 2.6.3 does not want 'path used as a word ;-)

so do you think that   
   to-path reduce [ my-path  'my-next-refinement]
the best that I can do?

If your interpreter chokes on 'join, then I guess so...

I could try just Rebol/Core and see if that make a difference

It is not very often that Rebol blows out on me ... I can't remember 
when last before I started looking at my functor issues

That's 3 times tonight with only 2 teeny blocks and 2 paths  and 
no do against any file and nothing added to user.r

ah-ha !
Works fine in Rebol/Core  ! 

path: 't2/f
do join to-path do path 'a

Nope.

Back to View and this time Rebol did not blow out of the water .... 

Is there a dump.log that I can look at see what these fatal errors 
have been ?

Not sure.  Try working with -- trace on

>> t1: [a "one"]
== [a "one"]
>> t2: [f t1]
== [f t1]
>> path: 't2/f
== t2/f
>> do join to-path do path 'a
== "one"
; thanks CHRIS

Hey, if it works : )

I would not have stumbled on the 
   do path
any too soon, I fear ... ;-)

It's not the most intuitive move, for sure.

I am adding 
   augpath: func [{augment path with a word}
to my armory

Now to find out what typo of mine is able to blow 2.6.3 outa the 
wadder

augpath: func [{ augment a PATH with a WORD }path 'word] [
      return join to-path reduce[path] :word]
; augpath t2/f a

oops!
IGnoring the needless return,  that is one word longer than

>> pword: func [path 'word /local blk] [
    to-path reduce[path :word]]
; ;-)

; I mean
 augpath: func [path 'word ] [
    to-path reduce[path :word]]

; but IN the interpreter, to use join
>> do join to-path do my-path 'a-further-refinement
; is terrific and has led me to
my-path:  to-path join reduce[ my-path ] 'a-deeper-tag

Nope 
another typo
  my-path: t2/f
That is trivial
It has to be 
  my-path: 't2/f
or
  my-path: to-path [t2 f]

JOIN does a reduce, so that's probably your problem. to-path reduce 
is not doing what you expect there, it's creating a path inside a 
path (no wonder it may crash :).

use append copy path word

also, you need to reduce your blocks above, because you have words 
in them, not subblocks.

Thanks.  I should also have used a type block in my func 

   augpath: func [ {augment a path with a word} path [path!] functor 
   [ word! ] /local p ] [

Once there are only subblocks it becomes trivial;  I have been trying 
to augment a path! series which starts with a block in which a tagged-word 
is bound to a block .  By augment the path I mean to return a path, 
not the result of evaluating the path
  t1: [ a-word-with-no-value-functor "one" ]

  t2: [ functor t1 ]  ; t1 is a word, not a block, but is bound to 
  a block at the time the path is extended into it ( if possible without 
  t2 being an object! )
  t2: context [ functor t1] ; also trivial

; this work fine for traversal
>> navpath: func [ pth [path!] 'wrd [word!] /local p42 ] [
[    p42: do pth
[    to-path reduce [p42 :wrd]]
>> pp: navpath path a
== t1/a
>> do pp
== "one"

where path was
path: to-path [ t2 f ]