Magento system.xml and 404 error when trying to access the configuration panel

Question

I'm trying to implement some configuration settings for my custom module. I've managed to add a tab and a section in the left navigation bar. But when I want to open a section I get a 404 error page without any further information.

So far, I've tried anything to get it working.. reading blogs, examples etc. but I can't find the error. Maybe someone of you can explain me what I'm doing wrong.

My adminhtml.xml:

<?xml version="1.0" ?>
<config>
    <resources>
        <admin>
            <children>
                <system>
                    <children>
                        <config>
                            <children>
                                <tempest_section translate="title" module="Tempest">
                                    <title>Tempest</title>
                                </tempest_section>
                            </children>
                        </config>
                    </children>
                </system>
            </children>
        </admin>
    </resources>
</config>

My config.xml:

<?xml version="1.0"?>

<config>
    <modules>
        <Polyvision_Tempest>
            <version>0.1.0</version>
        </Polyvision_Tempest>
    </modules>


    <global>
        <helpers>
            <Tempest>
                <class>Polyvision_Tempest_Helper</class>
            </Tempest>  
        </helpers>
    </global>        

    <admin>
        <routers>
            <adminhtml>
                <args>
                    <modules>
                        <tempest before="Mage_Adminhtml">Polyvision_Tempest_Adminhtml</tempest>
                    </modules>
                </args>
            </adminhtml>
        </routers>
    </admin>


    <adminhtml>
        <menu>
            <menu1 translate="title" module="Tempest">
                <title>polyvision</title>
                <sort_order>60</sort_order>
                <children>
                    <menuitem1 module="Tempest">
                        <title>Tempest - Export</title>
                        <action>adminhtml/tempest_main</action>
                    </menuitem1>
                </children>                
            </menu1>
        </menu>
    </adminhtml>    

    <default>
        <tempest>
            <settings>
                <export_directory>/tmp/</export_directory>
            </settings>
        </tempest>
    </default>
</config>

My system.xml:

<?xml version="1.0" ?>
<config>
    <tabs>
        <polyvision module="Tempest" translate="label">
            <label>polyvision</label>
            <sort_order>100</sort_order>
        </polyvision>
    </tabs>
    <sections>
        <tempest_section module="Tempest" translate="label">
            <label>Tempest-Einstellungen</label>
            <sort_order>200</sort_order>
            <show_in_default>1</show_in_default>
            <show_in_website>1</show_in_website>
            <show_in_store>1</show_in_store>
            <tab>polyvision</tab>
            <groups>
                <settings translate="label">
                    <label>Settings</label>
                    <comment></comment>
                    <sort_order>10</sort_order>
                    <show_in_default>1</show_in_default>
                    <show_in_website>1</show_in_website>
                    <show_in_store>1</show_in_store>
                    <fields>
                        <export_directory translate="label tooltip comment">
                            <label>My Custom Field</label>
                            <comment>Some comment about my field</comment>
                            <tooltip>Field ToolTip</tooltip>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                        <frontend_input>text</frontend_input>
                        <source_model>adminhtml/system_config_text</source_model>
                    </export_directory>
                </fields>
            </settings>
        </groups>
    </tempest_section>
</sections>

Well, my module itself works without hassles. Only the admin settings are not working :/

Answer 1

If it's the 404 in the Admin Console chrome, then your problem is a missing ACL role. Read this article on how to set one up. (self link)

Also, after setting up your ACL role, you'll need to clear out your Magento sessions. Magento caches specific roles in the session, and new sessions won't be automatically added to the cache of users with the super user role.