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Event Registration Cancellations

Good morning,

We have been using the Combo Order endpoint for a while to cancel event registrations. However, over the past month or so, we have been receiving an error when we attempt to do this with the combo order. I even grabbed the combo order from the cart for someone I was cancelling and attempted to run it through the Postman as produced by ASI and it failed with the same error. We have found that if we remove the Additional Attribute below from the Lines section of the order, the order lines will be cancelled but the event will not have a status of cancelled. If we leave the IsEventCancellation attribute in, we get the following error, {"$type":"Asi.Soa.Core.DataContracts.ValidationResultsData, Asi.Contracts","Errors":{"$type":"Asi.Soa.Core.DataContracts.ValidationResultDataCollection, Asi.Contracts","$values":[{"$type":"Asi.Soa.Core.DataContracts.ValidationResultData, Asi.Contracts","Message":" \r\n UnknownEntityTypeFault: vBoGiftsReceivedForReceipting Not defined."}]},"Warnings":{"$type":"Asi.Soa.Core.DataContracts.ValidationResultDataCollection, Asi.Contracts","$values":[]}}.

{
		"$type": "Asi.Soa.Core.DataContracts.GenericPropertyData, Asi.Contracts",
		"Name": "IsEventCancellation",
		"Value": {
			"$type": "System.Boolean",
			"$value": true
    }
}

All this seems to have started about the time of the IQA security rollout but I am not certain of the timing.

Any assistance is appreciated.

Thanks,
Korey