I'm getting an exception, "Duplicate call to addWithDupCheck detected" in an application that creates and updates Contact records.
For what it's worth, I'm using the Novak Solutions SDK, so XML-RPC, but I see someone else's issue on github wondering about the same error on the infusionsoft-php library (https://github.com/infusionsoft/infusionsoft-php/issues/108) - and so that makes me think it is an Infusionsoft issue and I am posting here instead of the issue queue for the library.
What I expect to happen is for the addWithDupCheck to return a contact ID if the contact already exists. As far as I know, this was the behavior until about two weeks ago.
I reviewed the API documentation for this method and can't find anything regarding duplicate calls.
Is it a bug, or expected behavior? If it is not a bug, I'd like learn more about when addWithDupCheck is allowed and when it is not.
Great job on the new forums, I am glad to have them back.