Open settings.php in your drupal sites/default/settings.php and add the following line in the top &

Open settings.php in your drupal sites/default/settings.php and add the following line in the top

ini_set('memory_limit', '32M');

This will increase the memory limit to 32M. Replace 32M with whatever size you want like 50M, etc...

for example
<?php
ini_set('memory_limit', '32M');
....
?>

Hope this helps.