Help Needed: Error in Real-Time Data Acquisition Using I2C on BeagleBone Black

Hello guys, am settling up the BeagleBone Black for real-time data acquisition using I2C on an embedded Linux OS? I have tried setting up the BeagleBone Black with the embedded Linux OS, configured the I2C protocol on the BeagleBone Black, connected the I2C device to the BeagleBone Black, implemented the necessary code to communicate with the I2C device, attempted to acquire real-time data from the I2C device.
But keep getting the error

Failed to acquire bus access and/or talk to slave.

Failed to acquire bus access and/or talk to slave.

This is my code

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>

int main()
{
    int file;
    char filename[40];
    int addr = 0x68; // I2C device address

    snprintf(filename, sizeof(filename), "/dev/i2c-1"); // I2C bus
    file = open(filename, O_RDWR);
    if (file < 0) {
        printf("Failed to open the I2C bus\n");
        return 1;
    }

    if (ioctl(file, I2C_SLAVE, addr) < 0) {
        printf("Failed to acquire bus access and/or talk to slave\n");
        return 1;
    }

    // Code to communicate with the I2C device and acquire real-time data

    close(file);
    return 0;
}

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>

int main()
{
    int file;
    char filename[40];
    int addr = 0x68; // I2C device address

    snprintf(filename, sizeof(filename), "/dev/i2c-1"); // I2C bus
    file = open(filename, O_RDWR);
    if (file < 0) {
        printf("Failed to open the I2C bus\n");
        return 1;
    }

    if (ioctl(file, I2C_SLAVE, addr) < 0) {
        printf("Failed to acquire bus access and/or talk to slave\n");
        return 1;
    }

    // Code to communicate with the I2C device and acquire real-time data

    close(file);
    return 0;
}