Fatal error: Class Helper_Data' not found in app\Mage.php

Question

Please help me guys to fix it :

Fatal error: Class 'Mage_Parcelamento_Helper_Data' not found in C:\wamp64\www\magento\app\Mage.php on line 547

Error log

Warning: include(Mage\Parcelamento\Helper\Data.php): failed to open stream: No such file or directory in lib\Varien\Autoload.php on line 94

Answer 1

There are two possibilities:

1) Either you declared your helper in the config.xml and you did not create it in the module NameSpace/NameModule/Helper/Data.php

2) Either you created it in the module but not in the config.xml or you did it wrong.

Solution:

You should have this in your config.xml:

<global>
  ...
    <helpers>
        <parcelamento>
            <class>Namespace_Parcelamento_Helper</class>
        </parcelamento>
    </helpers>
  ...
</global>

You should also have this in :Namespace/Parcelamento/Helper/Data.php

<?php

class Namespace_Parcelamento_Helper_Data extends Mage_Core_Helper_Abstract
{

}

Now you can call your helper like this:

<?php Mage::helper('parcelamento')?>

Answer 2

Check in your code you will find code as below

Mage::helper('parcelamento')

Check in your module config file have helper name like bwlow.

<helpers>
    <module>
       <class>Namespace_Module_Helper</class>
    </module>
</helpers>

replace Parcelamento with your helper name

Answer 3

To get the website and admin panel live again, I disabled the compilation via SFTP.

You can do that by editing the root/includes/config.php file.

To disable compilation in Magento, edit includes/config.php, comment out the first line (line 28) and uncomment out the second line (line 29).

Your final code should look like this (without brackets):

#define('COMPILER_INCLUDE_PATH', dirname(FILE).DIRECTORY_SEPARATOR.'src');  
#define('COMPILER_COLLECT_PATH', dirname(FILE).DIRECTORY_SEPARATOR.'stat');

Hope this helps.