A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/internationaljou/public_html/application/models/Upcoming_conferencelist.php:101)

Filename: core/Common.php

Line Number: 570

Backtrace:

An uncaught Exception was encountered

Type: mysqli_sql_exception

Message: Expression #1 of ORDER BY clause is not in SELECT list, references column 'internationaljou_ssrgdbnew.upcoming_conference.conferencedate' which is not in SELECT list; this is incompatible with DISTINCT

Filename: /home/internationaljou/public_html/system/database/drivers/mysqli/mysqli_driver.php

Line Number: 305

Backtrace:

File: /home/internationaljou/public_html/application/models/Upcoming_conferencelist.php
Line: 43
Function: get

File: /home/internationaljou/public_html/application/controllers/Upcoming.php
Line: 21
Function: get_year

File: /home/internationaljou/public_html/index.php
Line: 315
Function: require_once