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Advocate II
Advocate II

Operation null was not found in swagger

Hey team,


I am building a custom connector that utilizes a 2-stage dynamic lookup. After a connection is created you need to specify the host and environment to continue.


In order for it to work, the host must be selected, then the available environments are loaded from there. I believe I have the swagger file setup correctly, but when I try to select a trigger it I get the following error:




Operation null was not found in swagger.


My gut is telling me this is related to an expected operationId not being present, but I can't figure it out for the life of me.

Can anyone give me a clue of where to look? I am not able to share my swagger json.




Super User
Super User

Hello @nhance 

Have a look at this thread:

It seems you need an OperationId in your definition file.

Hope it helps!


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Community Support
Community Support

Hi @nhance,


What's the service of the custom connector?

There is a blog custom connector of Facebook, you could refer to it, hope it could help you:


Best Regards,
Community Support Team _ Lin Tu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.


Thank you, but what my connector is trying to do is a nested x-ms-dynamic-list.


Basically, I need to select the host using x-ms-dynamic-list which gives me an output parameter I can use to fetch the list of environments for that host.


With both the selected host and the list of environments, I can then select an environment.


Having both the host and the environment selected, I can then make a call to my API.


It appears that perhaps this nested dependency inside the API won't work. I would very much like to present the options for users to select.

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