How to print the url and the filename from image field in views-view-unformatted.tpl.php in Drupal 7?
The full file object isn't necessarily loaded into the node object, you could try loading it manually and grabbing the filename/URL that way:

$file = file_load($node-&gt;field_slider_image['und'][0]['fid']);

// Filename
print $file-&gt;filename;

// URI e.g. public://image.jpg
print $file-&gt;uri;

// URL e.g. /sites/default/files/image.jpg
print file_create_url($file-&gt;uri);