I use this command in terminal
php yii xml/cron-import catalog import.xml
It calls
$productClass = $this->getProductClass();
http://joxi.ru/EA43OZqSOwLQQ2
$this->exModule includes object of this class
http://joxi.ru/82QxaNgcyjY5Em
Overall i get this error because $this->getProductClass() returns null
Exception 'Error' with message 'Class name must be a valid object or a string'
I’ll appreciate for any help