#declare a = inside(objAnimal,0); // 1

#declare objAnimal = isosurface { // 2
  function { x-inside(objAnimal,<x,y,z>) } // 3

line (1) is parsed correctly (object objAnimal exist, it is defined etc...) 
but (3) returns error :

File: C:\dev\pov\irtc\Loneliness\noe\noe.pov  Line: 109
#declare objAnimal = isosurface {
  function { x-inside(objAnimal <----ERROR
Parse Error: Expected 'operand', object identifier found instead
Returned from renderer with error status

how to fix it ?

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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