Tad Bochan warns about a problem with MPEX:

> DEV:print mpyikes;num
>        1) setvar mpe ""
>        2) if bound(insidempex) and insidempex=1
>        3)    setvar mpe "mpe "
>        4) endif
>        5) !mpe echo ![word("xxx yyy zzz",,-1)]
>
> DEV:xeq mpyikes
> zzz
>
> DEV:main.pub.vesoft "mpyikes"
> xxx yyy zzz
>
> If line 5 is changed to :
>        5) !mpe echo ![word("xxx yyy zzz"," ",-1)]
>
> it works fine.

What's even more curious about this is that if line 5 is changed to

         5) !mpe calc word("xxx yyy zzz",,-1)

it works fine as well!


As a separate issue, I would like to point out that

         2) if bound(insidempex) and insidempex=1

works inside MPEX *only* if the variable is bound!  For 'insidempex'
this is fine, but for generic variable X this is not.  This is because
unlike MPE (and Qedit), MPEX does *not* perform short-circuit evaluation.
For non-bound vars, the error appears as:

         %if bound(x) and x=1
         Processing BOUND(X) AND X=1
                                 ^
         Variable name encountered, but variable is not defined. (CIERR 9805)

--Glenn