Unable to load user defined function through feval - crashing

[Arun]

Hi,
i am facing issue while loading my own octave function through cpp
standalone application . 

my own octave is working well in octave cli and octave editor in octave
4.2.2 , where as in cpp its throwing segment fault , whereas inbuilt
function like gcd its working if running example 


my cpp function which is failing
#include <iostream>
#include <iostream>
#include <octave/oct.h>
#include <octave/octave.h>
#include <octave/parse.h>
#include <octave/interpreter.h>
using namespace std;
int
main (void)
{

try{
  string_vector argv (2);
  argv(0) = "embedded";
  argv(1) = "-q";

  octave_main (2, argv.c_str_vec (), 1);

  octave_idx_type n = 1;
  octave_value_list in;
  
  in(0) = "test"; 

  octave_value_list out = feval ("audioclick", in, 1);

  if (out.length () > 0)
    std::cout << out(0).int_value ()
              << std::endl;    
  else
    std::cout << "invalid\n";

  
 }catch(const std::exception& e){
        std::cout << " a standard exception was caught, with message '"
                  << e.what() << "'\n";
     }  
}

i saved audioclick path in octaverc 
i used mkoctfile  --link-stand-alone main.cpp -o embedded for compilation 


the following example program working successfully 

example program
#include <iostream>
#include <iostream>
#include <octave/oct.h>
#include <octave/octave.h>
#include <octave/parse.h>
#include <octave/interpreter.h>
using namespace std;
int
main (void)
{

try{
  string_vector argv (2);
  argv(0) = "embedded";
  argv(1) = "-q";

  octave_main (2, argv.c_str_vec (), 1);

  octave_idx_type n = 1;
  octave_value_list in;

  for (octave_idx_type i = 0; i < n; i++)
   in(i) = octave_value (5 * (i + 2));
 

  octave_value_list out = feval ("gcd", in, 1);

  if (out.length () > 0)
    std::cout << "GCD of ["
              << in(0).int_value ()
              << ", "
              << in(1).int_value ()
              << "] is " << out(0).int_value ()
              << std::endl;
    
  else
    std::cout << "invalid\n";

  
 }catch(const std::exception& e){
        std::cout << " a standard exception was caught, with message '"
                  << e.what() << "'\n";
     }
  
}

please help me to resolve this issue as i am struggling



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