ERROR - 2017-09-22 12:33:39 --> Severity: Warning --> mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given /opt/lampp/htdocs/22sept/siddharth_application/system/database/drivers/mysqli/mysqli_result.php 38 ERROR - 2017-09-22 12:33:49 --> Severity: Warning --> mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given /opt/lampp/htdocs/22sept/siddharth_application/system/database/drivers/mysqli/mysqli_result.php 38 ERROR - 2017-09-22 12:34:03 --> Severity: Warning --> mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given /opt/lampp/htdocs/22sept/siddharth_application/system/database/drivers/mysqli/mysqli_result.php 38 ERROR - 2017-09-22 12:36:26 --> Query error: Column 'PONO' cannot be null ERROR - 2017-09-22 12:38:43 --> Severity: Warning --> mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given /opt/lampp/htdocs/22sept/siddharth_application2/system/database/drivers/mysqli/mysqli_result.php 38