After compiling a test module that sets a variable equal to "test successful", I get a "directive is duplicate in (path to conf file)"

#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
//#include <ngx_log.h>
//#include <ngx_conf_file.h>

#define MAX_STRING_LEN 256

// static char *ngx_http_netacuity(ngx_conf_t *cf, void *post, void *data);

// static ngx_conf_post_handler_pt ngx_http_netacuity_p = ngx_http_netacuity;

static void *ngx_http_netacuity_create_conf(ngx_conf_t *cf);
static ngx_int_t ngx_http_netacuity_add_variables(ngx_conf_t *cf);
static ngx_int_t ngx_http_netacuity_test_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data);


/**
Module configuration struct
*/
typedef struct {
ngx_int_t featureCode;
} ngx_http_netacuity_conf_t;

/**
Initializes memory for module configuration struct
*/
static void *ngx_http_netacuity_create_conf(ngx_conf_t *cf)
{
ngx_conf_log_error(NGX_LOG_DEBUG, cf, 0, "HIT FUNCTION ---> ngx_http_netacuity_create_conf");
ngx_http_netacuity_conf_t *conf;

conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_netacuity_conf_t));
if(conf == NULL) {
return NULL;
}
conf->featureCode = NGX_CONF_UNSET_UINT;

return conf;

}

/**
Module directive array, which holds a subarray for each module directive
*/
static ngx_command_t ngx_http_netacuity_commands[] = {
{
ngx_string("testAPI"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_HTTP_MAIN_CONF_OFFSET,
offsetof(ngx_http_netacuity_conf_t, featureCode),
NULL
},
ngx_null_command
};

/**
The module context, which has hooks for creating the configuration
*/
static ngx_http_module_t ngx_http_netacuity_module_ctx = {
ngx_http_netacuity_add_variables, //preconfiguration
NULL, //postconfiguration

ngx_http_netacuity_create_conf, //create main configuration
NULL, //init main configuration

NULL, //create server configuration
NULL, //merge server configuration

NULL, //create location configuration
NULL //merge location configuration
};

/**
The module which binds the context and commands
*/
ngx_module_t ngx_http_netacuity_module = {
NGX_MODULE_V1,
&ngx_http_netacuity_module_ctx, //module context
ngx_http_netacuity_commands, //module directives
NGX_HTTP_MODULE, //module type
NULL, //init master
NULL, //init module
NULL, //init process
NULL, //init thread
NULL, //exit thread
NULL, //exit process
NULL, //exit master
NGX_MODULE_V1_PADDING
};

/**
Holds all the API Variables that the user can call upon
*/
static ngx_http_variable_t ngx_http_netacuity_vars[] = {
{
ngx_string("testVar"), NULL, ngx_http_netacuity_test_variable, MAX_STRING_LEN, 0, 0
},

{ ngx_null_string, NULL, NULL, 0, 0, 0 }
};

/**
Called during preconfiguration - adds variables for use
*/
static ngx_int_t ngx_http_netacuity_add_variables(ngx_conf_t *cf)
{
ngx_conf_log_error(NGX_LOG_DEBUG, cf, 0, "HIT FUNCTION ---> ngx_http_netacuity_add_variables");
ngx_http_variable_t *var, *v;

for(v = ngx_http_netacuity_vars; v->name.len; v++) {
var = ngx_http_add_variable(cf, &v->name, v->flags);
if(var == NULL) {
return NGX_ERROR;
}
var->get_handler = v->get_handler;
var->data = v->data;
}

return NGX_OK;
}

/**
Get handlers for variables
*/
static ngx_int_t ngx_http_netacuity_test_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_log_error(NGX_LOG_DEBUG, (r->connection)->log, 0, "HIT FUNCTION ---> ngx_http_netacuity_test_variable");
size_t len;
char *val;
ngx_http_netacuity_conf_t *nac;

nac = ngx_http_get_module_main_conf(r, ngx_http_netacuity_module);

if(nac->featureCode == 0) {
goto not_found;
}

val = "test successful";

if(val == NULL) {
goto not_found;
}

len = ngx_strlen(val);
v->data = ngx_pnalloc(r->pool, len);

if(v->data == NULL) {
//ngx_free(val);
return NGX_ERROR;
}

ngx_memcpy(v->data, val, len);

v->len = len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;

//ngx_free(val);
return NGX_OK;

not_found:
v->not_found = 1;
return NGX_OK;
}


Can someone explain what's going on? I tried googling the error, but found nothing useful.

This is my conf file :

worker_process 1;

events {
worker_connections 1024;
}

http {

include mine.types;
default_type application/octet-stream;

log_format main ‘$remote_addr’;

testAPI 7;

access_log logs/access.log main;

sendfile on;

keepalive_timeout 65;

server {

listen 80;
server_name localhost;


location / {

root html;
index index.html index.htm;

}

error_page 500 502 503 504 /50x.html;
location = /50x.html {

root html;

}

}

}