Enable Exception Reporting
Magento does not display exceptions by default. To enable exception printing in Magento you only have rename the file “errors/local.xml.sample” file in your Magento folder to
cd /<Magento-htdocs-folder>/errors mv local.xml.sample local.xml
"Magento Admin Panel" > System > Configuration > Advanced > Log Settings and set the log setting “Enabled” to “Yes”.
Once you have enabled logging you will find an exception and a system log in your
tail -f <Magento-htdocs-folder>/var/log/system.log
Set the PHP Error Reporting Level and make sure errors are displayed
Make sure your PHP error reporting level is set to
E_ALL in your index.php - this will make sure no errors are swollowed by the system.
And also that the PHP’s
display_errors flag is set to true:
Enable Magentos Developer Mode
When you turn on Magento’s developer mode you will get more detailed error messages and stack traces.
Enable Developer Mode in your .htaccess:
SetEnv MAGE_IS_DEVELOPER_MODE "true"