Cronjob Problem Using Cpanel

I am trying to set cron job using cpanel. when cron run it give me following error. please help me.

PHP Error[2]: Invalid argument supplied for foreach()

in file /home/ravi/public_html/yiiapp/yii/framework/collections/CMap.php

at line 288

#0 /home/ravi/public_html/yiiapp/yii/framework/base/CModule.php(468):

mergeArray()

#1 /home/ravi/public_html/yiiapp/yii/framework/base/CComponent.php(153):

CConsoleApplication->setComponents()

#2 /home/ravi/public_html/yiiapp/yii/framework/base/CModule.php(483):

CConsoleApplication->__set()

#3 /home/ravi/public_html/yiiapp/yii/framework/base/CApplication.php(144):

CConsoleApplication->configure()

#4 /home/ravi/public_html/yiiapp/yii/framework/YiiBase.php(127):

CConsoleApplication->__construct()

#5 /home/ravi/public_html/yiiapp/yii/framework/YiiBase.php(115):

createApplication()

#6 /home/ravi/public_html/yiiapp/yii/framework/yiic.php(24):

createConsoleApplication()

#7 /home/ravi/public_html/yiiapp/protected/yiic.php(8): require_once()

#8 /home/ravi/public_html/yiiapp/protected/yiic(4): require_once()