Sometimes it will compile,sometimes it won't!

Hello all, I need enlightenment again. I am working on modifying a program the uses the eventually library for Arduino. I have seen this message where commands do not work,but I don't know why. This setup compiles on a different program, perfectly. My guess is that I have made another in a long line of notation errors.  Thanks, Quince

Arduino: 1.8.16 (Windows 7), Board: "Arduino Uno"





















sketch_jun21c:33:1: error: 'Serial' does not name a type

 Serial.begin(115200);           //Initialize the Serial Port to view information on the Serial Monitor

 ^~~~~~

sketch_jun21c:34:1: error: 'Wire' does not name a type

 Wire.begin();                    //Initialize I2C communication to the let the library communicate with the sensor.

 ^~~~

sketch_jun21c:36:1: error: 'mySensor' does not name a type

 mySensor.initSensor();          //The I2C Address can be changed here inside this function in the library

 ^~~~~~~~

sketch_jun21c:37:1: error: 'mySensor' does not name a type

 mySensor.setOperationMode(OPERATION_MODE_NDOF);   //Can be configured to other operation modes as desired

 ^~~~~~~~

sketch_jun21c:38:1: error: 'mySensor' does not name a type

 mySensor.setUpdateMode(AUTO);  //The default is AUTO. Changing to MANUAL requires calling the relevant update functions prior to calling the read functions

 ^~~~~~~~

sketch_jun21c:40:1: error: 'servo0' does not name a type

 servo0.attach (5);

 ^~~~~~

sketch_jun21c:41:1: error: 'servo1' does not name a type

 servo1.attach(6);

 ^~~~~~

sketch_jun21c:42:1: error: 'servo2' does not name a type

 servo2.attach(9);

 ^~~~~~

sketch_jun21c:43:9: error: expected constructor, destructor, or type conversion before '(' token

 pinMode (5, OUTPUT);

         ^

sketch_jun21c:44:9: error: expected constructor, destructor, or type conversion before '(' token

 pinMode (6, OUTPUT);

         ^

sketch_jun21c:45:9: error: expected constructor, destructor, or type conversion before '(' token

 pinMode (9, OUTPUT);

         ^

sketch_jun21c:46:1: error: 'ypr' does not name a type

 ypr[0];

 ^~~

sketch_jun21c:47:1: error: 'ypr' does not name a type

 ypr[1];

 ^~~

sketch_jun21c:48:1: error: 'ypr' does not name a type

 ypr[2];

 ^~~

sketch_jun21c:50:1: error: expected declaration before '}' token

 }

 ^

exit status 1

'Serial' does not name a type



This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

Will not complie

#include <Eventually.h>
EvtManager mgr;
#include <Servo.h>
#include <Wire.h>
#include <I2Cdev.h>
#include "Arduino_NineAxesMotion.h"

/* Assign a unique ID to this sensor at the same time */

NineAxesMotion mySensor;         //Object that for the sensor

unsigned long lastStreamTime = 0;     //To store the last streamed time stamp
const int streamPeriod = 20;
Servo servo0;
Servo servo1;
Servo servo2;
int servoValues[3];
int servoPos = 0; //
int compassCorrection = 0; // set to 0 (not used)
float ypr[3];// [yaw, pitch, roll]   yaw/pitch/roll containerint heading= mySensor.readEulerHeading

void setup(void)
{
// Get Yaw, Pitch and Roll values from the sensor      {*5}
  ypr[0] = (mySensor.readEulerHeading()); //Heading data
  ypr[1] = (mySensor.readEulerRoll()); //Roll data
  ypr[2] = (mySensor.readEulerPitch()); //Pitch data
}

//Peripheral Initialization
Serial.begin(115200);           //Initialize the Serial Port to view information on the Serial Monitor
Wire.begin();                    //Initialize I2C communication to the let the library communicate with the sensor.
//Sensor Initialization
mySensor.initSensor();          //The I2C Address can be changed here inside this function in the library
mySensor.setOperationMode(OPERATION_MODE_NDOF);   //Can be configured to other operation modes as desired
mySensor.setUpdateMode(AUTO);  //The default is AUTO. Changing to MANUAL requires calling the relevant update functions prior to calling the read functions
//Setting to MANUAL requires fewer reads to the sensor
servo0.attach (5);
servo1.attach(6);
servo2.attach(9);
pinMode (5, OUTPUT);
pinMode (6, OUTPUT);
pinMode (9, OUTPUT);
ypr[0];
ypr[1];
ypr[2];
int heading = (ypr[0]);
}
//USE_EVENTUALLY_LOOP(mgr)
{

Will compile

#include <Servo.h>
#include <Wire.h>
#include <I2Cdev.h>
#include "Arduino_NineAxesMotion.h"

/* Assign a unique ID to this sensor at the same time */

NineAxesMotion mySensor;         //Object that for the sensor

unsigned long lastStreamTime = 0;     //To store the last streamed time stamp
const int streamPeriod = 20;
Servo servo0;
Servo servo1;
Servo servo2;
int servoValues[3];
int servoPos = 0; //
int compassCorrection = 0; // set to 0 (not used)
float ypr[3];// [yaw, pitch, roll]   yaw/pitch/roll containerint heading= mySensor.readEulerHeading

void setup(void)
{


//Peripheral Initialization
Serial.begin(115200);           //Initialize the Serial Port to view information on the Serial Monitor
Wire.begin();                    //Initialize I2C communication to the let the library communicate with the sensor.
//Sensor Initialization
mySensor.initSensor();          //The I2C Address can be changed here inside this function in the library
mySensor.setOperationMode(OPERATION_MODE_NDOF);   //Can be configured to other operation modes as desired
mySensor.setUpdateMode(AUTO);  //The default is AUTO. Changing to MANUAL requires calling the relevant update functions prior to calling the read functions
//Setting to MANUAL requires fewer reads to the sensor
servo0.attach (5);
servo1.attach(6);
servo2.attach(9);
pinMode (5, OUTPUT);
pinMode (6, OUTPUT);
pinMode (9, OUTPUT);
ypr[0];
ypr[1];
ypr[2];
int heading = (ypr[0]);
}
void loop(void)
{
  /* Get a new sensor event */
  mySensor.updateEuler();        //Update the Euler data into the structure of the object
  mySensor.updateCalibStatus();  //Update the Calibration Status
  Serial.print("Time: ");
  // Serial.print(lastStreamTime);
  //Serial.print("ms ");

  Serial.print(" H: ");
  Serial.print(mySensor.readEulerHeading()); //Heading data
  Serial.print("deg ");

  Serial.print(" R: ");
  Serial.print(mySensor.readEulerRoll()); //Roll data
  Serial.print("deg");

  Serial.print(" P: ");
  Serial.print(mySensor.readEulerPitch()); //Pitch data
  Serial.print("deg ");

  Serial.print(" A: ");
  Serial.print(mySensor.readAccelCalibStatus());  //Accelerometer Calibration Status (0 - 3)

  Serial.print(" M: ");
  Serial.print(mySensor.readMagCalibStatus());    //Magnetometer Calibration Status (0 - 3)

  Serial.print(" G: ");
  Serial.print(mySensor.readGyroCalibStatus());   //Gyroscope Calibration Status (0 - 3)

  Serial.print(" S: ");
  Serial.print(mySensor.readSystemCalibStatus());   //System Calibration Status (0 - 3)

  Serial.println();
  // Get Yaw, Pitch and Roll values from the sensor      {*5}
  ypr[0] = (mySensor.readEulerHeading()); //Heading data
  ypr[1] = (mySensor.readEulerRoll()); //Roll data
  ypr[2] = (mySensor.readEulerPitch()); //Pitch data


if ((ypr[0] - compassCorrection) >= 0)
{
  ypr[0] = (ypr[0]  - compassCorrection);
}
else
{
  ypr[0] = (ypr[0] - compassCorrection + 360);
}

Serial.print(ypr[0]); 
Serial.println(ypr[0]);

// Calculate corresponding servo position
//if heading is greater than 90 and less that270
if (ypr[0] > 90 && ypr[0] < 270)
{
 // ir heading is less than or equal to 180
  if (ypr[0] <= 180)
  {
    //servo position 180
    servoPos = 180;
  }
  else
  {
    servoPos = 10;
  }
}
else
{
  if (ypr[0] <= 90)
  {
    servoPos = map(ypr[0], 0, 90, 85, 10);
  }
  else
  {
    servoPos = map(ypr[0], 360, 270, 85, 180);
  }
}


delay(10);
}