[metapost] uinsg z1, z2, ... in more than one macros caused 'Inconsistent equation'

[Karel Horak]

Just say
  save x,y
and all temprorarily used pairs z in body of your 
definitions would be saved.

enjoy mp,
Karel Horak

Steven Woody napsal(a):
> hi,
> 
> in my mp file, i defined two macros, say foo, bar,  using def ...
> enddef;   then in the main figure, i call foo followed by bar.  And, i
> used z1, z2 in both foo and bar as temporarily.  but the metapost
> reported "Inconsistent equation" when it processed in calling of bar.
> i think i need to make z1, z2 local in foo and bar respectively, but i
> failed, because "save z1, z2" will cause another errors.  what's the
> clue?
> 
> thanks in advance.
>