I am getting the following error (except a different class each time applicable to the extension) every time I try to install an extension: Fatal error: Class 'Lanot_EasySticker_Helper_Data' not found in /home/aaadmin/public_html/app/Mage.php on line 546. I have seen it on the dashboard, and in some modules- not til accessing the configuration area. This is the part in Mage.php that reads the following:

     * Retrieve helper object
     * @param string $name the helper name
     * @return Mage_Core_Helper_Abstract
    public static function helper($name)
        $registryKey = '_helper/' . $name;
        if (!self::registry($registryKey)) {
            $helperClass = self::getConfig()->getHelperClassName($name);
            self::register($registryKey, new $helperClass);
        return self::registry($registryKey);

If it's a permission issue. I haven't seemed to be able to figure it out. Please advise.

  • Does file Helper/Data.php exist in the extension? is it readable by the web-server? if it exists, what operating system are you using so we can help with the permissions?
    – Dan
    Commented Apr 2, 2013 at 9:28
  • I give my folders a 755 and my files a 644. It is a Linux server. The files all seem to be there! Commented Apr 2, 2013 at 9:30
  • Are you fixing the permissions again for the module after you are installing them? Since only the modules are broken, it can't be a problem with the other part of magento or else it would be broken as a whole since the core uses that function heavily.
    – Dan
    Commented Apr 2, 2013 at 9:37
  • 1
    I had compilation on I think that was it. Commented Apr 2, 2013 at 11:04

2 Answers 2


The package on Magento Connect seems to work just fine. I tested it against

Since you said you had compilations turned on, disable that, clear your cache and try again.

Afterward, rerun your compilation.

I hope this helps.


Make sure the class exists: If it doesn't create it: File: app/code/local/Lanot/EasySticker/Helper/Data.php with this content

class Lanot_EasySticker_Helper_Data extends Mage_Core_Helper_Abstract{
  • The files are there that's the weird part Commented Apr 2, 2013 at 9:29

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