That property doesn't exists in the class you are using as context. But in the rule editor, General tab, you have a section called Temporary Variables, you can create there, and reference it with @<name> in the rule. In your case, your assing will be:

assing @Namespace = Piece(AlertRequest.SourceConfigName,"|")

Here is the documentation:

Temporary Variables

User-specified temporary variables, which you can use in the rule definition. The variables must be separated by commas, for example:

FreeShippingValue,ShipMethod,PremierMember

You can reference a temporary variable in a rule definition by preceding the variable name with the @ (at sign) character, for example, @FreeShippingValue. You cannot use temporary variables outside the rule definition. To pass information to a transformation, you can instead use the RuleUserData property. For more information, see Selecting the Transformation and Target of a Send Action.

According to the documentation, there is a parameter "pFormat" that has default value acelo, where:

• c - output the ObjectScript-specific "_class" and "_id" properties

So, if you just call the transform like this, it should work:

set dynObj = ##class(%ZEN.Auxiliary.altJSONProvider).%ObjectToAET(person, , , "aelo")

After executing your query, you need to move cursor and then you can get data:

SET SC = resultset.Prepare(sql) 
SET SC = resultset.Execute()
if (resultset.Next(.SC)) {
	quit:$$$ISERR(SC)
	set cnt = resultset.Data("CNT")
}
SET SC = resultset.Close()