I have a very old solution, designed for FileMaker 9, and which was used successfully in all later versions of FileMaker (except 16, which was never installed)
The customer has upgraded to FileMaker to 17, and we have a strange issue that I can't reproduce on a fresh file.
A script does a simple GTRR, starting from a layout in form view and going to another in list view.
In the layout settings, other views are disabled.
As a result, we end up in the layout in list view displayed as form (and the blue icon in the toolbar correctly reflects this), although this layout is not 'allowed' to display as a form.
Has anyone seen such a thing before?