Fatal error: Uncaught exception 'ImagickException' with message 'unable to open file `/tmp/test.png' @ error/png.c/ReadPNGImage/3244' in /usr/share/doc/php5-imagick/examples/thumbnail.php:11
Stack trace:
#0 /usr/share/doc/php5-imagick/examples/thumbnail.php(11): Imagick->readimage('/tmp/test.png')
#1 {main}
  thrown in /usr/share/doc/php5-imagick/examples/thumbnail.php on line 11