Have updated to the latest git, been a month or two since the last update here.
Previous 3.7.2git (a little back) ran fine.
With the latest,
flowgraphs seem to start but immediately exit ('done') when
there is a QT GUI Range control on
them. If the QT GUI Range is deleted and replaced with
a QT GUI entry, (selecting the same variable that the Range previously selected) then the flow graph runs fine.
Tried it on several different flowgraphs contianing other QT GUI widgets, seems
that the range control breaks all the flowgraphs, and replacing with Entry fixes all.
-- Tom, N5EG