MPU6050 + HMC5883L not working together

[angargon]

Hello,

I'm trying to get the information from the magnetometer from the sketch MPU6050_DMP6.ino but I'm not succeeding.

I am using a GY-87 board that has MPU6050 + HMC5883L + BMP180 with an Arduino MEGA

I can satisfactorily read all the sensors separately, for example the MPU6050_DMP6.ino it works very well with the offsets I have previously obtained and visualize the Teapot processing sketch in a very stable way.
On the other hand, in sketch HMC5883L_raw.ino I can get the magnetometer values ​​that change as I move the device without problems. I had to add some lines to get to the magnetometer:

mpu.initialize ();
mpu.setI2CMasterModeEnabled (0);
mpu.setI2CBypassEnabled (1);
mag.initialize();
Serial.println(mag.testConnection() ? "HMC5883L connection successful" : "HMC5883L connection failed");
mag.setMode(0);

I verify that both devices are reachable and effectively they are.

The problem comes when I want to get the information from the magnetometer from the sketch MPU6050_DMP6.ino
I put the reading between lines 258 and 267, where it says:

// other program behavior stuff here
//.
//.
//.
// if you are really paranoid you can often test in between other
// stuff to see if mpuInterrupt is true, and if so, "break;" from the
// while () loop to immediately process the MPU data
//.
//.
//.
mag.getHeading(&mx, &my, &mz);
Serial.println(mx);
Serial.println(my);
Serial.println(mz);

I get the perfect readings of the mpu6050 but the readings of the magnetometer seem frozen, they are always the same as if I only read the first value and did not read any more.

Besides reading these two components I would need to read more things like the bmp180 or a gps encoder,...

I would need some help please.

Best Regards,

Tony