CFE-ConfigValidator-4: Invalid Validator in config spec

This error occurs when MPF does not understand the config specification for a device. Unless you created custom config specs in a mode, (external) platform or custom device, this is certainly a bug in MPF. Please report this in our forum in that case!

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 MPF Users Google Group 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 MPF Users Google Group.