Exception: Invalid resource

[Kla3mus]

Hi!

I'm using your Library, Version 4.2.1 from Nuget, in a very simple way:

IMailChimpManager mcm = new MailChimpManager(MailChimpApiKey);
await mcm.Members.AddOrUpdateAsync(MailChimpListId, new Member {
EmailAddress = model.Email,
Status = Status.Subscribed });

The last three days or so I get a weird exception when AddOrUpdateAsync() executes. -> "Invalid Resource"
There is a collection called Errors, where there is one element of type MailChimpError, that has a field; "MMERGE3" and a Message; "Please enter a value"

The message of the exception is:
Title: Invalid Resource
Type: http://developer.mailchimp.com/documentation/mailchimp/guides/error-glossary/
Status: 400
Detail: Your merge fields were invalid.
Errors: MMERGE3 Please enter a value

Before these three-four days everything has been working perfectly.

Is there an update coming, am I doing something wrong, should I change something?

[mikehachen]

Pretty sure, MERGE3 field is a mandatory field, so you have to provide a value for the field. You can check this online in your MC account.

[Kla3mus]

Hmm..

As far as I can see, there is no MMERGE3 Property in the Member class. I have a property called MergeFields, that is a dictionary, but I don't understand why a field that is not specified in the Member class should be mandatory?

Where in the MC account can i find if a field is mandatory? (I have just done the integration, not an avid user of MC in general. Sorry)

[mikehachen]

Merge fields are custome fields. Every mailchimp customer can/will have different fields. Thats why they can't be membes... You'll find the merge fields in the settings of the corresponding mailchimp list (or audience list, I think they now call it audience list)...

[Kla3mus]

Thank you so much. I found it.

Audience -> All Contacts -> Settings -> Audience fields and |MERGE| tags

Here they have a column called Required? with a checkbox in, that they had selected. :)

Your help is much appreciated!