I visited many sites for find solution of this issue.

But after creating system.xml and acl.xml Magento give me a report generated error.


a:4:{i:0;s:140:"Notice: Undefined index: id in /usr/local/ampps/www/mgn2/vendor/magento/module-config/Model/Config/Structure/Element/Iterator.php on line 59";i:1;s:6391:"#0 /usr/local/ampps/www/mgn2/vendor/magento/module-config/Model/Config/Structure/Element/Iterator.php(59): Magento\Framework\App\ErrorHandler->handler(8, 'Undefined index...', '/usr/local/ampp...', 59, Array)

Can you clarify this issues?


<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
        <tab id="Pulsestorm" translate="label" sortOrder="200">
        <section id="config_helloworld" translate="label" type="text" sortOrder="110" showInDefault="1" showInWebsite="1" showInStore="1">
            <group id="general" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
                <field id="enable" translate="label comment" type="select" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
                    <label>Enable Hello World</label>
                <field id="block_label" translate="label" type="text" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1">
                    <label>Module page title</label>


<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Acl/etc/acl.xsd">
            <resource id="Magento_Backend::admin">
                <resource id="Magento_Backend::stores">
                    <resource id="Magento_Backend::stores_settings">
                        <resource id="Magento_Config::config">
                            <resource id="Pulsestorm_HelloWorldMVVM::config_helloworldmvvm" title="HelloWorldMVVM" />

1 Answer 1


In your system.xml replace this


with this

  • @Marius: Can you share a bit context? I get the same error but I'm puzzled what to enter in my case.
    – hakre
    Commented Sep 23, 2016 at 10:19
  • 2
    you are referencing a tab that does not exist. Each <tab> tag has an id and this way you can add sections under certain tabs. But if you add a section under a tab that does not exist you get the error above.
    – Marius
    Commented Sep 23, 2016 at 10:27
  • @Marius: Yes, just found it myself, too. Thanks a lot. Now on to the next mystery ... :)
    – hakre
    Commented Sep 23, 2016 at 10:30
  • @Marius: Me too faced same type of issue. Fixed by your answer thanks a lot ;)
    – Srihari
    Commented Oct 5, 2016 at 6:43
  • Tanks. i have face an issue with it and now got the solution
    – Amit Bera
    Commented Jun 7, 2017 at 11:24

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