Overlay disappeared after returning to tool

[jlampel]

I'm not entirely sure what happened here, but I used RetopoFlow in a file and then spent some time doing other tasks in object mode like working with modifiers, rendering, compositing, lighting, and shading. When I came back to RetopoFlow, the tools overlays did not display (such as the preview in PolyPen or the brush in Tweak) and I saw the following error in the console:

AttributeError: 'NoneType' object has no attribute 'spaces'
Traceback (most recent call last):
  File "C:\Users\Jonathan\AppData\Roaming\Blender Foundation\Blender\4.3\scripts\addons\retopoflow\retopoflow\rfoverlays\loopstrip_selection_overlay.py", line 80, in draw_postpixel_overlay
    is_done = (self.RFCore.selected_RFTool_idname != rftool_idname)

  File "C:\Program Files\Blender Foundation\Blender 4.3\4.3\scripts\modules\bpy_types.py", line 936, in __getattribute__
    properties = _StructRNA.path_resolve(self, "properties")

ReferenceError: StructRNA of type RFOperator_Strokes_Selection_Overlay has been removed
Traceback (most recent call last):
  File "C:\Users\Jonathan\AppData\Roaming\Blender Foundation\Blender\4.3\scripts\addons\retopoflow\retopoflow\rfcore.py", line 387, in handle_postpixel
    if len(area.spaces) == 0:

Restarting Blender and opening the same file resolved the issue. I will see if I can find specific steps to trigger this again.

[jlampel]

I found you can trigger a similar error by having a RF tool active in the Modeling workspace (where Edit Mode is the default mode), switching to a different workspace that is in Object Mode, and then switching back. In this scenario though, switching to a different tool and back or toggling Edit Mode will reset the tool and fix the issue.

AttributeError: 'NoneType' object has no attribute 'spaces'
Traceback (most recent call last):
  File "C:\Users\Jonathan\AppData\Roaming\Blender Foundation\Blender\4.3\scripts\addons\retopoflow\retopoflow\rfcore.py", line 304, in handle_draw_cursor
    if len(area.spaces) == 0:

[vxlcoder]

i am not able to replicate this now. it might have been fixed by changes that made loading a .blend file with RF selected, but I'm not sure. can you try replicating this issue again, @jlampel?