Warning: imagepng() [function.imagepng]: Unable to open

[hanpedro]

I have an error message.

latest("latest_morningWebYGb", "test", 2, 20)

Warning: imagepng() [function.imagepng]: Unable to open
'./data/file/test/sm_aHR0cDovL2NmczkuYmxvZy5kYXVtLm5ldC9pbWFnZS8xNy9ibG9nLzIwMDgvMDMvMjcvMDUvMjMvNDdlYWIwYjM5MGMxMSZhbXA7ZmlsZW5hbWU9wL28usG2sKKw+L/4KDA4MDMxNSk4MzEuanBn' for writing: 洹몃윴 �뙆�씪�씠�굹 �뵒�젆�넗由ш? �뾾�쓬 in /var/www/html/homep1/skin/latest/latest_morningWebYGb/YouChangWha.lib.php on line 207

This file exists:
'./data/file/test/sm_aHR0cDovL2NmczkuYmxvZy5kYXVtLm5ldC9pbWFnZS8xNy9ibG9nLzIwMDgvMDMvMjcvMDUvMjMvNDdlYWIwYjM5MGMxMSZhbXA7ZmlsZW5hbWU9wL28usG2sKKw+L/4KDA4MDMxNSk4MzEuanBn'

The source that contains imagepng is here:

function make_smallimg ($src, $src_w, $src_h, $src_t, $copy, $copy_w, $copy_h, $copy_rule='both-', $copy_pos='2', $force='0'){

  $src = trim($src);
  $copy = trim($copy);
  $copy_rule = trim($copy_rule);
  if (empty($copy_rule) || ($copy_rule != 'width' && $copy_rule != 'height' && $copy_rule != 'both+' && $copy_rule != 'both-')) $copy_rule = 'both-';
  $copy_pos = trim($copy_pos);
  if (empty($copy_pos) || ($copy_pos != '1' && $copy_pos != '2' && $copy_pos != '3' && $copy_pos != '4' && $copy_pos != '5')) $copy_rule = '2';



  if (is_file($copy) && $force != '1') return true;//썸네일이 이미 생성된 상태라면 새로 만들지 않음



  if ($src_t == 1)
    $src = @imagecreatefromgif($src);
  else if ($src_t == 2)
    $src = @imagecreatefromjpeg($src);
  else if ($src_t == 3)
    $src = @imagecreatefrompng($src);
  else
    return false; // gif, jpg, png 이미지가 아님

  if (empty($src)) return false;//이미지를 읽어올수 없음

  if (empty($copy) || $copy_w < 10 || $copy_h < 10) return false; //&#50040;&#45348;&#51068; &#44221;&#47196;&#44032; &#50630;&#44144;&#45208; &#45320;&#48708;&#45208; &#45458;&#51060;&#44032; 10&#48372;&#45796; &#51089;&#51020;

  $src_x = 0;
  $src_y = 0;
  $copy_x = 0;
  $copy_y = 0;

  if ($copy_pos == '5'){//&#53356;&#47213;&#50630;&#51060; &#44053;&#51228;&#47196; &#53356;&#44592; &#47582;&#52644;

$new_w =  $copy_w;
$new_h = $copy_h;
  }
  else {

if ($copy_rule == 'both+') {//&#44596;&#51901;&#51012; &#44592;&#51456;

  if ($src_w >= $src_h) $copy_rule = 'width';
  else $copy_rule = 'height';
}
else if ($copy_rule == 'both-') {//&#51687;&#51008;&#51901;&#51012; &#44592;&#51456;

  if ($src_w <= $src_h) $copy_rule = 'width';
  else $copy_rule = 'height';
}

if ($copy_rule == 'width') {//&#45320;&#48708;&#50640; &#47582;&#52644;

  $rate = $src_h / $src_w;
  $new_w = $copy_w;
  $new_h = (int) ($rate * $copy_w);
}
else {//&#45458;&#51060;&#50640; &#47582;&#52644;

  $rate = $src_w / $src_h;
  $new_h = $copy_h;
  $new_w = (int) ($rate * $copy_h);
}

if ($copy_rule == 'width') {//&#45320;&#48708;&#50640; &#47582;&#52644;

  if ($copy_pos == '4') {//&#48708;&#50984;&#45824;&#47196;

    $copy_h = $new_h;
  }
  else {

    if ($new_h < $copy_h){//&#47564;&#46308;&#50612;&#51656; &#50040;&#45348;&#51068; &#45458;&#51060;&#44032; &#48708;&#50984;&#45824;&#47196; &#51460;&#50668;&#51652; &#45458;&#51060;&#48372;&#45796; &#53364;&#44221;&#50864; &#44032;&#50868;&#45936; &#50948;&#52824;&#49884;&#53428;

      $copy_y = (int) (($copy_h - $new_h) / 2);
    }
    else {

      if ($copy_pos == '1' || empty($copy_pos)) {//&#50896;&#48376;&#50640;&#49436; &#49345;&#45800;&#51012; &#44592;&#51456;&#51004;&#47196; &#44032;&#51256;&#50740;

        //&#44592;&#48376;&#44050; &#44536;&#45824;&#47196;
      }
      else if ($copy_pos == '2') {//&#50896;&#48376;&#50640;&#49436; &#51473;&#50521;&#51012; &#44592;&#51456;&#51004;&#47196; &#44032;&#51256;&#50740;

        $temp_h = (int) ($copy_h / $copy_w * $src_w);
        $src_y = (int) (($src_h - $temp_h) / 2);
      }
      else if ($copy_pos == '3') {//&#50896;&#48376;&#50640;&#49436; &#54616;&#45800;&#51012; &#44592;&#51456;&#51004;&#47196; &#44032;&#51256;&#50740;

        $temp_h = (int) ($copy_h / $copy_w * $src_w);
        $src_y = $src_h - $temp_h;
      }
    }
  }
}
else {//&#45458;&#51060;&#50640; &#47582;&#52644;

  if ($copy_pos == '4') {//&#48708;&#50984;&#45824;&#47196;

    $copy_w = $new_w;
  }
  else {

    if ($new_w < $copy_w){//&#47564;&#46308;&#50612;&#51656; &#50040;&#45348;&#51068; &#45320;&#48708;&#44032; &#48708;&#50984;&#45824;&#47196; &#51460;&#50668;&#51652; &#45320;&#48708;&#48372;&#45796; &#53364;&#44221;&#50864; &#44032;&#50868;&#45936; &#50948;&#52824;&#49884;&#53428;

      $copy_x = (int) (($copy_w - $new_w) / 2);
    }
    else {

      if ($copy_pos == '1' || empty($copy_pos)) {//&#50896;&#48376;&#50640;&#49436; &#50812;&#51901;&#51012; &#44592;&#51456;&#51004;&#47196; &#44032;&#51256;&#50740;

        //&#44592;&#48376;&#44050; &#44536;&#45824;&#47196;
      }
      else if ($copy_pos == '2') {//&#50896;&#48376;&#50640;&#49436; &#51473;&#50521;&#51012; &#44592;&#51456;&#51004;&#47196; &#44032;&#51256;&#50740;

        $temp_w = (int) ($copy_w / $copy_h * $src_h);
        $src_x = (int) (($src_w - $temp_w) / 2);
      }
      else if ($copy_pos == '3') {//&#50896;&#48376;&#50640;&#49436; &#50724;&#47480;&#51901;&#51012; &#44592;&#51456;&#51004;&#47196; &#44032;&#51256;&#50740;

        $temp_w = (int) ($copy_w / $copy_h * $src_h);
        $src_x = $src_w - $temp_w;
      }
    }
  }
}
  }

  $dst = @imagecreatetruecolor($copy_w, $copy_h);
  if (empty($dst)) return false;

  $background_color = @imagecolorallocate($dst, 255, 255, 255);
  if (empty($background_color)) return false;

  imagefilledrectangle($dst, 0, 0, $copy_w, $copy_h, $background_color);
  imagecopyresampled($dst, $src, $copy_x, $copy_y, $src_x, $src_y, $new_w, $new_h, $src_w, $src_h);

  imagepng($dst, $copy);
  chmod($copy, 0777);
  return true;
}

And permission is 707, and nobody nobody.

Any comment would be appreciated.