How to display avatar

Could you post the entire block of code where you are trying to paste the field?

<div class="author-info">
				<div class="author-avatar">
					//AVATAR
					<?php echo $user->adt_user_photo_url

					/*<?php echo get_avatar( get_the_author_meta( 'user_email' ), apply_filters( 'twentytwelve_author_bio_avatar_size', 60 ) ); ?>*/?>
				</div><!-- .author-avatar -->
				<div class="author-description">
					<h2><?php printf( __( 'About %s', 'twentytwelve' ), get_the_author() ); ?></h2>
					<p><?php the_author_meta( 'description' ); ?></p>
				</div><!-- .author-description	-->
			</div><!-- .author-info -->

Hi, you haven’t really created the $user object. Try this:

<?php
$userID = get_the_author_meta('ID');
$user = get_userdata( $userID );
echo $user->adt_user_photo_url;
?>

Make sure to close the php before you open another one as well.

Excellent, all working.

Thank you for coming back to me.