Discussions

Using the REST API we would like to adjust a dues invoice. The response is "OperationNotAvailable".
We are using the execute method with the ProcessCashAdjustment.
Here is the our JSON:

"$type": "Asi.Soa.Core.DataContracts.GenericExecuteRequest, Asi.Contracts",
"OperationName": "ProcessCashAdjustment",
"EntityTypeName": "Invoice",
"Parameters": {
    "$type": "System.Collections.ObjectModel.Collection1[[System.Object, mscorlib]], mscorlib",
    "$values": [
        {
            "$type": "Asi.Soa.Commerce.DataContracts.InvoiceActionCashAdjustmentData, Asi.Contracts",
            "InvoiceId": "10776",
            "AdjustmentDate": "2025-10-16",
            "InvoiceLineAdjustments": {
                "$type": "System.Collections.Generic.List1[[Asi.Soa.Commerce.DataContracts.PartialInvoiceLine, Asi.Contracts]], mscorlib",
                "$values": [
                    {
                        "$type": "Asi.Soa.Commerce.DataContracts.PartialInvoiceLine, Asi.Contracts",
                        "Item": {
                            "$type": "Asi.Soa.Commerce.DataContracts.ItemSummaryData, Asi.Contracts",
                            "Description": "",
                            "ItemClass": {
                                "$type": "Asi.Soa.Commerce.DataContracts.ItemClassSummaryData, Asi.Contracts",
                                "ItemClassId": "DUES",
                                "Name": "Dues"
                            },
                            "ItemCode": "IND",
                            "ItemId": "IND",
                            "Name": "Annual Individual Membership"
                        },
                        "ItemSet": null,
                        "ProductCode": "IND",
                        "IsRemoved": false,
                        "OriginalUnitPrice": null,
                        "NewUnitPrice": null,
                        "AdjustmentPrice": 10
                    }
                ]
            }
        }
    ]
},
"ParameterTypeName": {
    "$type": "System.Collections.ObjectModel.Collection`1[[System.String, mscorlib]], mscorlib",
    "$values": [
        "Asi.Soa.Commerce.DataContracts.InvoiceActionCashAdjustmentData, Asi.Contracts"
    ]
},
"UseJson": false

}

Can someone please help?