My function like this:

class scheduler_demo(models.Model):
    _name = 'scheduler.demo'
    name = fields.Char(required=True)
    numberOfUpdates = fields.Integer('Number of updates', help='The number of times the scheduler has run and updated this field')
    lastModified = fields.Date('Last updated')

    #This function is called when the scheduler goes off
    def process_demo_scheduler_queue(self, cr, uid, context=None):
        print('Thai123')
        scheduler_line_obj = self.pool.get('scheduler.demo')
        #Contains all ids for the model scheduler.demo
        scheduler_line_ids = self.pool.get('scheduler.demo').search(cr, uid, [])
        #Loops over every record in the model scheduler.demo
        for scheduler_line_id in scheduler_line_ids :
            #Contains all details from the record in the variable scheduler_line
            scheduler_line =scheduler_line_obj.browse(cr, uid,scheduler_line_id ,context=context)
            numberOfUpdates = scheduler_line.numberOfUpdates
            #Prints out the name of every record.
            _logger.info('line: ' + scheduler_line.name)
            #Update the record
            scheduler_line_obj.write(cr, uid, scheduler_line_id, {'numberOfUpdates': (numberOfUpdates +1), 'lastModified': datetime.date.today()}, context=context)

My XML like this:

Problem is why i cant call the function process_demo_scheduler_queue.

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data noupdate="1">
        <record id="ir_cron_scheduler_demo_action" model="ir.cron">
            <field name="name">Demo scheduler</field>
            <field name="user_id" ref="base.user_root"/>
            <field name="interval_number">2</field>
            <field name="interval_type">minutes</field>
            <field name="numbercall">-1</field>
            <field name="model_id" ref="model_scheduler_demo"/>
            <field eval="False" name="doall"/>
            <field eval="'scheduler.demo'" name="model"/>
            <field eval="'process_demo_scheduler_queue'" name="function"/>
        </record>
   </data>
</odoo>