nAN-36 + nRF51822 PCA10028 APP_BUTTON_INIT [SOLVED]

Question

in the code below, the keil IDE is flagging with red squiggly APP_BUTTON_INIT, claiming that it is an undefined symbol. It also says that this implicit declaration of 'APP_BUTTON_INIT' is not valid for c99 
 I called out the proper GPIOTE function before this and I have the "app_button.h" included. I dont know what to do this has been driving me crazy. 
 static void buttons_init(void)
{ 
 // Note: Array must be static because a pointer to it will be saved in the Button handler
 // module.	
 static app_button_cfg_t buttons[] =
 {
 {WAKEUP_BUTTON_PIN, false, BUTTON_PULL, NULL},
 {LEDBUTTON_BUTTON_PIN_NO, false, BUTTON_PULL, button_event_handler}
 };

 APP_BUTTON_INIT(buttons, sizeof(buttons) / sizeof(buttons[0]), BUTTON_DETECTION_DELAY, true);
 
}
 
 TL;DR ANSWER Below: 
 The Correct solution was to replace 
 APP_BUTTON_INIT(buttons, sizeof(buttons) / sizeof(buttons[0]), BUTTON_DETECTION_DELAY, true);
 
 with 
 app_button_init(buttons, sizeof(buttons) / sizeof(buttons[0]), BUTTON_DETECTION_DELAY);
 
 differences Note: the method is lower case, and the last parameter within said method is no longer defined.

Stian Røed Hafskjold · Accepted Answer

The only way I can reproduce this is if I deliberately delete the #define APP_BUTTON_INIT(...) definition in app_button.h . 
 Are you sure there are no typos or something in app_button.h ? Is the file added to the include paths? 
 If you download the example from git again ( github.com/.../nrf51-ble-app-lbs) , and put it in the SDK 7.1 examples/ble_peripheral folder without modifying it, does it compile? 
 What happens if you replace the call to the APP_BUTTON_INIT macro in main.c with a direct call to app_button_init() ? like this: 
 app_button_init(buttons, sizeof(buttons) / sizeof(buttons[0]), BUTTON_DETECTION_DELAY, app_button_evt_schedule);

nAN-36 + nRF51822 PCA10028 APP_BUTTON_INIT [SOLVED]

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