Making website on Magento 1.9. i installed an extension of sizechart by extension mall but after installing it gives an error of HTTP 500 error and after uncommenting

ini_set('display_errors', 1);

( it shows following error )

Fatal error: Class 'ExtensionsMall_SizeChart_Helper_Data' not found in /home/iranucom/public_html/app/Mage.php on line 547

can anyone guide how can i solve the same.

  • Is compilation on in your Magento 1.9?
    – kunj
    Commented Jun 25, 2018 at 3:49

1 Answer 1


I think you have to first check that in extension helper file exist or not.

Go to ExtensionsMall/SizeChart/Helper/Data.php where class ExtensionsMall_SizeChart_Helper_Data extends Mage_Core_Helper_Abstract should be exist.

Also check in ExtensionsMall/SizeChart/etc/config.xml file that helper is defined or not as below:


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