Fatal error: Allowed memory size of 41943040 bytes exhausted

Resolved: I added the following to the wp-config.php file

define('WP_MEMORY_LIMIT', '64M');

The following error occurs when I try to login from this URL:
http://www.realty-advisors.com/wp-admin/

Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 122880 bytes) in /home/realty24/public_html/wp-content/themes/rac/functions.php on line 621

When I attempt a login from http://realty-advisors.com/login the login page appears, yet generates a different error when I click the login button.

Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 122880 bytes) in /home/realty24/public_html/wp-includes/locale.php on line 152

I’m baffled!

The functions.php file references a plugin which, I believe, has been deactivated. Line 621 is:

<label for="<?php echo $this->get_field_id('city'); ?>"><input id="<?php echo $this->get_field_id('city'); ?>" name="<?php echo $this->get_field_name('city'); ?>" type="checkbox" value="checked" <?php echo ( $city ) ? 'checked="checked"' : '' ?> /> Show City</label><br />

Full section

<p><br />
	<em style="color:red;">This option requires AIOS Company Information Plugin</em><br />
	<label for="<?php echo $this->get_field_id('company_name'); ?>"><input id="<?php echo $this->get_field_id('company_name'); ?>" name="<?php echo $this->get_field_name('company_name'); ?>" type="checkbox" value="checked" <?php echo ( $company_name ) ? 'checked="checked"' : '' ?> /> Show Company Name</label><br />
	<label for="<?php echo $this->get_field_id('address1'); ?>"><input id="<?php echo $this->get_field_id('address1'); ?>" name="<?php echo $this->get_field_name('address1'); ?>" type="checkbox" value="checked" <?php echo ( $address1 ) ? 'checked="checked"' : '' ?> /> Show Address Line 1</label><br />
	<label for="<?php echo $this->get_field_id('address2'); ?>"><input id="<?php echo $this->get_field_id('address2'); ?>" name="<?php echo $this->get_field_name('address2'); ?>" type="checkbox" value="checked" <?php echo ( $address2 ) ? 'checked="checked"' : '' ?> /> Show Address Line 2</label><br />
	<label for="<?php echo $this->get_field_id('city'); ?>"><input id="<?php echo $this->get_field_id('city'); ?>" name="<?php echo $this->get_field_name('city'); ?>" type="checkbox" value="checked" <?php echo ( $city ) ? 'checked="checked"' : '' ?> /> Show City</label><br />
	<label for="<?php echo $this->get_field_id('state'); ?>"><input id="<?php echo $this->get_field_id('state'); ?>" name="<?php echo $this->get_field_name('state'); ?>" type="checkbox" value="checked" <?php echo ( $state ) ? 'checked="checked"' : '' ?> /> Show State</label><br />
	<label for="<?php echo $this->get_field_id('province'); ?>"><input id="<?php echo $this->get_field_id('province'); ?>" name="<?php echo $this->get_field_name('province'); ?>" type="checkbox" value="checked" <?php echo ( $province ) ? 'checked="checked"' : '' ?> /> Show Province</label><br />
	<label for="<?php echo $this->get_field_id('zipcode'); ?>"><input id="<?php echo $this->get_field_id('zipcode'); ?>" name="<?php echo $this->get_field_name('zipcode'); ?>" type="checkbox" value="checked" <?php echo ( $zipcode ) ? 'checked="checked"' : '' ?> /> Show Zip Code</label><br />
	<label for="<?php echo $this->get_field_id('country'); ?>"><input id="<?php echo $this->get_field_id('country'); ?>" name="<?php echo $this->get_field_name('country'); ?>" type="checkbox" value="checked" <?php echo ( $country ) ? 'checked="checked"' : '' ?> /> Show Country</label><br />
	<label for="<?php echo $this->get_field_id('telephone1'); ?>"><input id="<?php echo $this->get_field_id('telephone1'); ?>" name="<?php echo $this->get_field_name('telephone1'); ?>" type="checkbox" value="checked" <?php echo ( $telephone1 ) ? 'checked="checked"' : '' ?> /> Show Telephone 1</label><br />
	<label for="<?php echo $this->get_field_id('telephone2'); ?>"><input id="<?php echo $this->get_field_id('telephone2'); ?>" name="<?php echo $this->get_field_name('telephone2'); ?>" type="checkbox" value="checked" <?php echo ( $telephone2 ) ? 'checked="checked"' : '' ?> /> Show Telephone 2</label><br />
	<label for="<?php echo $this->get_field_id('fax'); ?>"><input id="<?php echo $this->get_field_id('fax'); ?>" name="<?php echo $this->get_field_name('fax'); ?>" type="checkbox" value="checked" <?php echo ( $fax ) ? 'checked="checked"' : '' ?> /> Show Fax</label><br />
	<label for="<?php echo $this->get_field_id('email1'); ?>"><input id="<?php echo $this->get_field_id('email1'); ?>" name="<?php echo $this->get_field_name('email1'); ?>" type="checkbox" value="checked" <?php echo ( $email1 ) ? 'checked="checked"' : '' ?> /> Show Email 1</label><br />
	<label for="<?php echo $this->get_field_id('email2'); ?>"><input id="<?php echo $this->get_field_id('email2'); ?>" name="<?php echo $this->get_field_name('email2'); ?>" type="checkbox" value="checked" <?php echo ( $email2 ) ? 'checked="checked"' : '' ?> /> Show Email 2</label><br />
  </p>
<?php
  }

  function update($new_instance, $old_instance)
  {
    $instance = $old_instance;
    $instance['title'] = $new_instance['title'];
	$instance['page'] = $new_instance['page'];
	$instance['thumb'] = $new_instance['thumb'];
	$instance['width'] = $new_instance['width'];
	$instance['height'] = $new_instance['height'];
	$instance['excerpt'] = $new_instance['excerpt'];

	$instance['company_name'] 	= $new_instance['company_name'];
	$instance['address1'] 		= $new_instance['address1'];
	$instance['address2'] 		= $new_instance['address2'];
	$instance['city'] 			= $new_instance['city'];
	$instance['state']			= $new_instance['state'];
	$instance['province'] 		= $new_instance['province'];
	$instance['zipcode'] 		= $new_instance['zipcode'];
	$instance['country'] 		= $new_instance['country'];
	$instance['telephone1']		= $new_instance['telephone1'];
	$instance['telephone2']		= $new_instance['telephone2'];
	$instance['fax']			= $new_instance['fax'];
	$instance['email1'] 		= $new_instance['email1'];
	$instance['email2'] 		= $new_instance['email2'];

	$instance['moreLink'] = $new_instance['moreLink'];
    return $instance;
  }

  function widget($args, $instance)
  {
	global $post;
    extract($args, EXTR_SKIP);

    echo $before_widget;
    $title = empty($instance['title']) ? ' ' : apply_filters('widget_title', $instance['title']);
	$excerpt = $instance['excerpt'];
	$page = $instance['page'];
	$thumb = $instance['thumb'];
	$width = $instance['width'];
	$height = $instance['height'];

	$info=array();
	$info['company_name']		= $instance['company_name'];
	$info['address1'] 			= $instance['address1'];
	$info['address2'] 			= $instance['address2'];
	$info['city']				= $instance['city'];
	$info['state']				= $instance['state'];
	$info['province'] 			= $instance['province'];
	$info['zipcode'] 			= $instance['zipcode'];
	$info['country'] 			= $instance['country'];
	$info['telephone1']			= $instance['telephone1'];
	$info['telephone2']			= $instance['telephone2'];
	$info['fax']				= $instance['fax'];
	$info['email1']				= $instance['email1'];
	$info['email2'] 			= $instance['email2'];

	$label=array( 'Company Name',
				  'Address',
				  'Address',
				  'City',
				  'State',
				  'Province',
				  'Zip Code',
				  'Country',
				  'Telephone',
				  'Telephone',
				  'Fax',
				  'Email',
				  'Email'
				);

	$moreLink = $instance['moreLink'];

    if (!empty($title))
      echo $before_title . $title . $after_title;;
	  $post_args=array(
						'post_type'		=>	'page',
						'p'				=>	$page
				);
		query_posts($post_args);
		$count=0;
		if ( have_posts() ) : while ( have_posts() ) : the_post();
	?>
		<div class="ABwidget">
			<div class="ABwidget-thumb">
				<a href="<?php echo get_permalink($post->ID);?>"><?php
				if(!empty($thumb))
					the_post_thumbnail(array($width,$height));
				?></a>
            </div>
            <div class="ABwidget-excerpt">
				<?php echo substr( strip_tags($post->post_content),0,$excerpt).'';?><br>
				<strong><a href="<?php echo get_permalink($post->ID);?>" id="ABlink"><?php echo ($moreLink) ? $moreLink : 'Read More..' ?></a></strong>
			</div>
			<div class="ABwidget-info">
				<?php
					foreach($info as $key=>$value){
						if(!empty($value) && $value!=""){
						?>
							<span id="<?php echo $key;?>"><label><strong><?php echo $label[$count];?>:</strong> </label><?php echo do_shortcode('[aios-company-info field="'.$key.'"]');?></span><br>
						<?php
						}
						$count++;
					}
				?>
			</div>
		</div>
	<?php
		endwhile; else:
			_e('Sorry, no page matched your criteria.');
		endif;
    echo $after_widget;
  }

}
add_action( 'widgets_init', create_function('', 'return register_widget("ABWidget");') );