magento model file not found / incorrectly included

Question

I'm trying to add a module (it's called paypal-payment fee) to our magento shop, but as soon as its installed it produces an error on every shop site.

Warning: include(FlyWebdesign_PaypalFee_Model_Sales_Quote_Address_Total_Paymentcharge.php) [function.include]: failed to open stream: No such file or directory  in /var/www/magento/includes/src/Varien_Autoload.php on line 93

it seems that the autoloader is trying to include the file with underscores instead of slashes, but in the Documentation it says that the underscores are replaced with slashes automatically by the autoloader, so i don't understand what is causing the error.

Thanks in advance

Samuel

Answer 1

Your shop probably has compilation enabled. When you install a new module the code has to be re-compiled, otherwise this kind of error happens.

Try to disable the compilation, re-install your module and enable the compilation again.