Create new Purchase Receipt Type

Hi @Denham,

Interesting question.!

I think the issue with how you are adding the receipt type. Instead of adding the type from the customization project, you can override the DAC definition by creating a custom POReceiptType attribute with the new receipt type.

Then we are just replacing the default POReceiptType attribute with the custom attribute. Example below,

using CRLocation = PX.Objects.CR.Standalone.Location;
using PX.Common;
using PX.Data.BQL.Fluent;
using PX.Data.ReferentialIntegrity.Attributes;
using PX.Data.WorkflowAPI;
using PX.Data;
using PX.Objects.AP;
using PX.Objects.AR;
using PX.Objects.CM.Extensions;
using PX.Objects.Common.Bql;
using PX.Objects.Common.GraphExtensions.Abstract;
using PX.Objects.Common;
using PX.Objects.CR;
using PX.Objects.CS;
using PX.Objects.GL.FinPeriods.TableDefinition;
using PX.Objects.GL;
using PX.Objects.IN;
using PX.Objects.PM;
using PX.Objects.PO;
using PX.Objects;
using PX.TM;
using System.Collections.Generic;
using System.Linq;
using System;

namespace PX.Objects.PO
{
    [PXNonInstantiatedExtension]
    public class PO_POReceipt_ExistingColumn : PXCacheExtension<PX.Objects.PO.POReceipt>
    {
        #region ReceiptType  
        [PXDBString(2, IsFixed = true, IsKey = true, InputMask = "")]
        [PXDefault(POReceiptType.POReceipt)]
        [PO_POReceipt_ExistingColumn.POReceiptTypeCustom.List()]
        [PXUIField(DisplayName = "Type")]
        [PX.Data.EP.PXFieldDescription]

        public string ReceiptType { get; set; }
        #endregion

        public class POReceiptTypeCustom
        {
            public const string All = "AL";
            public const string TransferReceipt = "RX";
            public const string POReceipt = "RT";
            public const string POReturn = "RN";
            public const string DReturn = "DN";
            public class ListAttribute : PXStringListAttribute
            {
                private static (string, string)[] ValuesToLabels = new[]
                {
                (POReceipt, Messages.PurchaseReceipt),
                (POReturn, Messages.PurchaseReturn),
                (TransferReceipt, Messages.TransferReceipt),
                (DReturn, "DNS Return")
            };

                public ListAttribute() : this(false) { }

                protected ListAttribute(bool all) : base(
                    all
                        ? (new[] { (All, Messages.All) }).Concat(ValuesToLabels).ToArray()
                        : ValuesToLabels)
                { }

                internal bool TryGetValue(string label, out string value)
                {
                    var index = Array.IndexOf(_AllowedLabels, label);
                    if (index >= 0)
                    {
                        value = _AllowedValues[index];
                        return true;
                    }
                    value = null;
                    return false;
                }

                public class WithAll : ListAttribute
                {
                    public WithAll() : base(true) { }
                }
            }
        }
    }
}

Publish the customization project, then the new receipt type should show-up in the Workflow Type to which you can use RN Workflow 

Once you add the workflow for the new type, you can Activate and publish it. I have attached the customization project you could try, I am not sure if the workflow is completely functional. But I think that should give some lead towards the solution.

Good Luck.!