Selection List frustration to the max

[Yannis]

Hello,

I am working on a project initially ported from VDF14.1 to VDF19.1.
In one of the views, the selection list refuses to popup, the main view is trying to setup a property of the list so it constrains the records, but any attempt to setup the property always ends up with the same error.
The list is not deferred, but no matter what, when I try setting up this property, I am always getting the same error, "Error 98. Invalid Message Set_psModule".

Just to be on the safe side (?), I have I have created again a simple master/details view and a new selection list using the wizard, and I have changed the reference to the selection list reference inside the DataDictionary, to the new list.
In this new view and new SL, I have also removed all the subclasses used and I am using VDF plain vanilla classes. Unfortunately, nothing has changed, and I can't understand why despite the endless hours spent on this ridiculous issue.

I am attaching 3 snapshots, as well as the view and the list source code, the selection list has been renamed to .pkg because it wouldn't allow me to upload it as an .SL file.

- Snapshot #1 is the view trying to popup the selection list, with the error
- Snapshot #2 is the Procedure Prompt of the view, trying to set the property's value.
(I have tried both above and below the Forward Send, since the list is modal I have set up the properties before, without any issues)
- Snapshot #3 is the DD where the list is used for the field

Any help or suggestion that could help me get out of this embarrassing misery is more than welcome :-)

Yannis