Problems with the BQL "IN<>" statement - acumatica

Question

The requirement I have is to get a list of all discount codes defined in an instance and which ones a particular customer is currently assigned to, in the case given CustomerID=28. I further have to include only discount codes that naturally will be applicable to customers. There are only 3 of these; "Customer", "Customer and Item", "Customer and Item price Class". These are ARDiscount.ApplicableTo containing "CU", "CP","CI"
Select a.CompanyID, a.DiscountID, a.DiscountSequenceID, b.ApplicableTo, c.CustomerID
From DiscountSequence a
Join ARDiscount b On a.CompanyID = b.CompanyID and a.DiscountID = b.DiscountID
Left Outer Join DiscountCustomer c On a.CompanyID = c.CompanyID
And a.DiscountID = c.DiscountID
And a.DiscountSequenceID = c.DiscountSequenceID
And (IsNull(c.CustomerID,0) = 0 OR c.CustomerID = 72)
Where a.CompanyID = 2
And b.ApplicableTo In ('CU','CP','CI')
Order By a.DiscountID, a.DiscountSequenceID
I created data view delegate to return the 4 columns I need to display and in the view I created
to read the data like the SQL query above I used the BQL "IN<>" statement like this. The method was taken directlty from a blog post found here :
https://asiablog.acumatica.com/2017/11/sql-in-operator-in-bql.html
Object[] applicableTovalues = new String[] { "CP","CI","CU" }; // Customer and Price Class // Customer and Item// Customer
var Results = PXSelectJoin<DiscountSequence
, InnerJoin<ARDiscount, On<DiscountSequence.discountID, Equal<ARDiscount.discountID>>
, LeftJoin<DiscountCustomer, On<DiscountSequence.discountID, Equal<DiscountCustomer.discountID>,
And<DiscountSequence.discountSequenceID, Equal<DiscountCustomer.discountSequenceID>,
And<Where<DiscountCustomer.customerID, Equal<Current<Customer.bAccountID>>,
Or<DiscountCustomer.customerID, IsNull>>>>>>>
, Where<DiscountSequence.discountID, IsNotNull
, And<ARDiscount.applicableTo, In<Required<ARDiscount.applicableTo>>>>
, OrderBy<Asc<DiscountSequence.discountID, Asc<DiscountSequence.discountSequenceID>>>
>.Select(Base, applicableTovalues);
The problem is that the resulting SQL server select statement caught with TRACE only includes the first of the three IN values (''CU'') leaving (CI and CU) out.
I was expecting all three values in the IN statement like this : AND [ARDiscount].[ApplicableTo] IN ( ''CP'', ''CI'', ''CU'')
exec sp_executesql N'SELECT [DiscountSequence].[DiscountID], [DiscountSequence].[DiscountSequenceID], [DiscountSequence].[LineCntr],
<snip>
[DiscountCustomer].[CreatedDateTime], [DiscountCustomer].[LastModifiedByID], [DiscountCustomer].[LastModifiedByScreenID], [DiscountCustomer].[LastModifiedDateTime]
FROM [DiscountSequence] [DiscountSequence] INNER JOIN [ARDiscount] [ARDiscount] ON ( [ARDiscount].[CompanyID] = 2) AND [DiscountSequence].[DiscountID] = [ARDiscount].[DiscountID]
LEFT JOIN [DiscountCustomer] [DiscountCustomer] ON ( [DiscountCustomer].[CompanyID] = 2) AND [DiscountSequence].[DiscountID] = [DiscountCustomer].[DiscountID]
AND [DiscountSequence].[DiscountSequenceID] = [DiscountCustomer].[DiscountSequenceID] AND ( [DiscountCustomer].[CustomerID] = #P0 OR [DiscountCustomer].[CustomerID] IS NULL )
WHERE ( [DiscountSequence].[CompanyID] = 2)
AND ( [DiscountSequence].[DiscountID] IS NOT NULL
AND [ARDiscount].[ApplicableTo] IN ( ''CU''))
ORDER BY [DiscountSequence].[DiscountID], [DiscountSequence].[DiscountSequenceID]
OPTION(OPTIMIZE FOR UNKNOWN) /* AR.30.30.00 */',N'#P0 int',#P0=39

Answer 1

The issue is passing the array into the 'params' parameter. It thinks that you are passing a list of parameters into the bql query instead of a single array as a parameter.
If you cast it as follows it should work:
.Select(Base, (object)applicableTovalues);