src/Web/ClientProxy.php
private function _errorOutput($errMsg)
    {
        //ob_clean();
        //Openbizx::$app->isInitialized = false;
        if (defined('OPENBIZ_INTERNAL_ERROR_VIEW') && Openbizx::$app->isInitialized) {
            //render the view
            $_GET['ob_err_msg'] = $errMsg;
            ob_end_clean();
            Openbizx::getObject(OPENBIZ_INTERNAL_ERROR_VIEW)->render();
            exit;
        } else {
            echo $errMsg;
            echo "<input type='button' NAME='btn_back' VALUE='Go back' onClick='history.go(-1);return true;'>";
        }
    }
private function _errorOutput($errMsg)
    {
        //ob_clean();
        //Openbizx::$app->isInitialized = false;
        if (defined('OPENBIZ_INTERNAL_ERROR_VIEW') && Openbizx::$app->isInitialized) {
            //render the view
            $_GET['ob_err_msg'] = $errMsg;
            ob_end_clean();
            Openbizx::getObject(OPENBIZ_INTERNAL_ERROR_VIEW)->render();
            exit;
        } else {
            echo $errMsg;
            echo "<input type='button' NAME='btn_back' VALUE='Go back' onClick='history.go(-1);return true;'>";
        }
    }
Show HTML error message
This method call by {@link ShowErrorMessage} if RPC flag false.

@param string $errMsg error message
@return void