帳票出力プラグイン　orderpdf　を　有効時に　下記のエラー
が起こってしまいます。まったく原因不明です。
以前も同じ現象がでたことがあります。よくあるエラーなのでしょうか？分かる方いましたらどうぞご教授ください



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1/1
InvalidArgumentException in Pimple.php line 78:
Identifier "orm.em" is not defined.
in Pimple.php line 78
at Pimple->offsetGet('orm.em') in Version201611111300.php line 90
at Version201611111300->createOrderPdf(object(Schema)) in Version201611111300.php line 45
at Version201611111300->up(object(Schema)) in Version.php line 262
at Version->execute('up', false, false) in Migration.php line 158
at Migration->migrate('201611111300', false) in AbstractPluginManager.php line 22
at AbstractPluginManager->migrationSchema(object(Application), '/home/users/2/main.jp-8515a8ea7dc31a98/web/ec/app/Plugin/OrderPdf/Resource/doctrine/migration', 'OrderPdf') in PluginManager.php line 64
at PluginManager->enable(array('name' => 'OrderPdf', 'event' => 'OrderPdfEvent', 'code' => 'OrderPdf', 'version' => '1.0.0', 'service' => array('OrderPdfServiceProvider'), 'orm.path' => array('/Resource/doctrine'), 'const' => array('logo_file' => 'logo.png', 'pdf_file' => 'nouhinsyo1.pdf', 'order_pdf_message_len' => '30')), object(Application)) in PluginService.php line 265
at PluginService->callPluginManagerMethod(array('name' => 'OrderPdf', 'event' => 'OrderPdfEvent', 'code' => 'OrderPdf', 'version' => '1.0.0', 'service' => array('OrderPdfServiceProvider'), 'orm.path' => array('/Resource/doctrine'), 'const' => array('logo_file' => 'logo.png', 'pdf_file' => 'nouhinsyo1.pdf', 'order_pdf_message_len' => '30')), 'enable') in PluginService.php line 319
at PluginService->enable(object(Plugin)) in PluginController.php line 240
at PluginController->enable(object(Application), '17')
at call_user_func_array(array(object(PluginController), 'enable'), array(object(Application), '17')) in HttpKernel.php line 144
at HttpKernel->handleRaw(object(Request), '1') in HttpKernel.php line 64
at HttpKernel->handle(object(Request), '1', true) in Application.php line 586
at Application->handle(object(Request)) in Application.php line 563
at Application->run() in index.php line 63