> Your code develop as:
> #declare X = 10;
> #local X = X - 1;
> In this contex, #local and #declare are synonims.
>
> So, yes, it works as expected.
>
> There is a difference when #local is used in an include file. In an
> include, any #local variables only exist within the include.

It is in an include, sorry in the above example the macro is in another 
file. Try this (two files):

// file1.inc
#macro A(B)
#local B = 5;
#end

// file2.pov
#include "file1.inc"
#declare X = 10;
A(X)
#warning concat("X = ",str(X,0,0))

X comes out as 5, but I would have expected 10.

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