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title: CFE-ConfigValidator-6: Device not found in section in your config

This error occurs when MPF does not find a device which is referenced by one of your settings in your config.


For instance, a flipper device references a switch and a coil:

    main_coil: c_flipper_left
    activation_switch: s_flipper_left

You can see to which type of device a setting references in the config reference of your device. For this instance, check the flipper config reference and you will find that main_coil references a coil and activation_switch references a switch.

Common Pitfalls


The most common source for this kind of error are typos. Check the name of your referenced device with the setting. Casing matters here (i.e. upper/lower case). Using an IDE with the MPF language server can help here.

Copy and Paste

We all do this and there is nothing wrong with copying configs from the docs. Almost all examples in the docs are tested and should not give this kind of error. However, sometimes we hide certain devices in the docs (i.e. switches and coils which are referenced by an examplary flipper device as above). This is done to improve readability but when copying those examples you might get this error. Nevertheless, you can click "Click to show full config" below all examples to see the full tested example which is tested to work in the MPF version corresponding to the docs.

Running Config from a different MPF Version

Sometimes MPF config specifications change. Check if your MPF version fits the config. If in doubt check the config reference for your device.

Referencing a different type of device

If you reference a different device MPF won't find it and show this error. Check the config reference of your device to see which device is expected or setup your IDE with the MPF language server.

Need more help troubleshooting?

Have a look at our Troubleshooting section. It might give you some hints for certain classes of problems.

What if this did not fix your problem?

Please tell us about your error in the community forum and we might be able to update this page afterwards. Or even better: You help us to update it afterwards.

Is something missing here? Do you have a helpful hint for others experiencing this error?

Please create a Pull Request and add it. Alternatively, please tell us in the community forum.

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