[![I am getting error whenever  I tried to print the orders invoice from my admin panel , Please help me how to fix this !!][1]][1]

  [1]: https://i.sstatic.net/XUPzq.png

I am getting error whenever I tried to print the **order's invoice** from my **admin panel** , Please help me how to fix this !!

    #0 /home/revsho/public_html/app/code/core/Mage/Sales/Model/Order/Pdf/Abstract.php(558): Mage::throwException('PDF total model...')
    #1 /home/revsho/public_html/app/code/core/Mage/Sales/Model/Order/Pdf/Abstract.php(579): Mage_Sales_Model_Order_Pdf_Abstract->_getTotalsList(Object(Mage_Sales_Model_Order_Invoice))
    #2 /home/revsho/public_html/app/code/core/Mage/Sales/Model/Order/Pdf/Invoice.php(149): Mage_Sales_Model_Order_Pdf_Abstract->insertTotals(Object(Zend_Pdf_Page), Object(Mage_Sales_Model_Order_Invoice))
    #3 /home/revsho/public_html/app/code/core/Mage/Adminhtml/Controller/Sales/Invoice.php(119): Mage_Sales_Model_Order_Pdf_Invoice->getPdf(Array)
    #4 /home/revsho/public_html/app/code/core/Mage/Adminhtml/controllers/Sales/Order/InvoiceController.php(489): Mage_Adminhtml_Controller_Sales_Invoice->printAction()
    #5 /home/revsho/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Adminhtml_Sales_Order_InvoiceController->printAction()
    #6 /home/revsho/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('print')
    #7 /home/revsho/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
    #8 /home/revsho/public_html/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
    #9 /home/revsho/public_html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
    #10 /home/revsho/public_html/index.php(83): Mage::run('', 'store')
    #11 {main}