When i try to create a new role i get the following error message :

Fatal error: Class 'Mage_Slidermanger_Helper_Data' not found in /var/www/html/app/Mage.php on line 547

Find block of code that has 547 as its last line:

$registryKey = '_helper/' . $name;
if (!self::registry($registryKey)) {
    $helperClass = self::getConfig()->getHelperClassName($name);
    self::register($registryKey, new $helperClass);
  • please provide Slidermanger extension adminhtml.xml and config.xml file I have solve this error in past Oct 18, 2016 at 12:46
  • @TejabhagavanKollepara You should read the question before stating that this is a possible duplicate of another question. This is nothing like that question. The title of this question could be better but it is definitely NOT a duplicate. Oct 18, 2016 at 13:01
  • @ShawnAbramson, i retracted that flag on this. Oct 20, 2016 at 7:19

2 Answers 2


I have encountered this issue before as well. You need to see if that class actually exists. It would either be located at

app/code/local/{vendorname}/Slidermanager/Helper/Data.php OR app/code/community/{vendorname}/Slidermanager/Helper/Data.php

If it does not exist in that location, that means the module's create was supposed to create but forgot to. You can create and install an empty one and your error will go away. Here is what you should create:


class {Vendorname}_Slidermanager_Helper_Data extends Mage_Core_Helper_Abstract


Possibility 1;

This issue might be happen if you have disable your slidermanger extension and its helper class in use just like $this->helper('slidermanger')

Possibility 2;

your helper config defination not match your module in your config.xml or adminhtml.xml

for example defination of helper


and use of helper

<slidermanager module="slidermanager">

Here module name should match with helper node of config.xml

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.