C++ include issue -

i writing plugin autodesk maya using c++ , have linker error.

my main class maya_search_plugin.cpp

#include <utilities.h>  declaresimplecommand( search_face, plugin_company, "4.5");  //doit method entry point plugin mstatus search_face::doit( const marglist& ) {     //calls maya types/functions , utilities functions } 

then have utilities class containing static methods header looking this

#ifndef __maya_cpp_plugin__utilities__ #define __maya_cpp_plugin__utilities__ //#pragma once  //standard libs #include <stdio.h> #include <time.h> #include <string.h> #include <iostream> #include <math.h>  //maya libs #include <maya/mdagpath.h> #include <maya/mfn.h> #include <maya/mfileio.h> #include <maya/miostream.h> #include <maya/mfnmesh.h> #include <maya/mfntransform.h> #include <maya/mglobal.h> #include <maya/mselectionlist.h> #include <maya/msimple.h> #include <maya/mtypes.h> #include <maya/mpointarray.h> #include <maya/mobjectarray.h>   class utilities{     public: static const int max_mov = 50; public:     static double get_mesh_error(mpointarray, mpointarray, int);     static mstatus translatemanipulator(double amount, mobject *path);     static void getselected(mobjectarray* objects, mfn::type type); };  #endif /* defined(__maya_cpp_plugin__utilities__) */ 

with implementation this

#include <utilities.h>  double utilities::get_mesh_error(mpointarray a, mpointarray b, int vertexcount){    ... }   mstatus utilities::translatemanipulator(double amount, mobject *path){    ... }   void utilities::getselected(mobjectarray* objects, mfn::type type) {    ... } 

however getting following error

duplicate symbol _mapiversion in:     /users/tmg06qyu/library/developer/xcode/deriveddata/maya_cpp_plugin-hjrwvybwlvqyyscbmixdkcpdzjqr/build/intermediates/maya_cpp_plugin.build/debug/maya_cpp_plugin.build/objects-normal/x86_64/maya_search_plugin.o     /users/tmg06qyu/library/developer/xcode/deriveddata/maya_cpp_plugin-hjrwvybwlvqyyscbmixdkcpdzjqr/build/intermediates/maya_cpp_plugin.build/debug/maya_cpp_plugin.build/objects-normal/x86_64/utilities.o ld: 1 duplicate symbol architecture x86_64 command /applications/xcode.app/contents/developer/toolchains/xcodedefault.xctoolchain/usr/bin/ld failed exit code 1 

which presume linking error , there circular reference somewhere, can't work out is.

any appreciated.

thanks.

i know year old. stumbled on again couple minutes ago...

add

#define mnoversionstring #define mnopluginentry #include <maya/mfnplugin.h> 

to header or cpp files wrote plugin code. include

#include <maya/mfnplugin.h> 

directly in main.cpp initializes plugin.

most of examples in maya have following string:

// added prevent multiple definitions of mapiversion string. #define _mapiversion 

before including anything. example here.