Hi Offray,
After loading Grafiscopio from the Catalog in a fresh Pharo-50760
image, selecting Launch>New notebook...
==> MNU GrafoscopioGUI class>>open
Finder shows #open is only understood by GrafoscopioBrowser
but GrafoscopioBrowser open
==> MNU: receiver of "/" is nil
in #openDefault at...
workingFile := draftsLocation / 'draft.ston'.
where draftsLocation is nil,
and searching all references show no method sets that variable.
In the comments is...
GrafoscopioBrowser configureSettings
but that ==> MNU.
Trying a rough guess to force...
draftsLocation := '/home/ben/grafosocpio' asFileRefence
lets the GrafoscopioBrowser open.
cheers -ben