A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: models/calls_model.php

Line Number: 102

Database Error

A Database Error Occurred

Error Number: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') ORDER BY `date_begin`, `time_begin`' at line 3

SELECT * FROM (`dates`) WHERE (relation = 'calls') AND (relation_id = ) ORDER BY `date_begin`, `time_begin`