Error in mesh edit mode.

[Jago1996]

Traceback (most recent call last): File "AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\coa_tools\operators\edit_mesh.py", line 1221, in modal bpy.context.scene.cursor_location = self.limit_cursor_by_bounds(context,scene.cursor_location) File "AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\coa_tools\operators\edit_mesh.py", line 820, in limit_cursor_by_bounds bounds.append(obj.matrix_world.inverted() * point) ValueError: Matrix.invert(ed): matrix does not have an inverse Traceback (most recent call last): File "AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\coa_tools\operators\edit_mesh.py", line 1186, in modal return self.exit_edit_mode(context,event) File "AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\coa_tools\operators\edit_mesh.py", line 1367, in exit_edit_mode bpy.types.SpaceView3D.draw_handler_remove(self.draw_handler, "WINDOW") ValueError: callback_remove(handle): NULL handle given, invalid or already removed Traceback (most recent call last): File "AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\coa_tools\operators\edit_mesh.py", line 1186, in modal return self.exit_edit_mode(context,event) File "AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\coa_tools\operators\edit_mesh.py", line 1367, in exit_edit_mode bpy.types.SpaceView3D.draw_handler_remove(self.draw_handler, "WINDOW") ValueError: callback_remove(handle): NULL handle given, invalid or already removed

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\coa_tools\operators\edit_mesh.py", line 1363, in modal self.exit_edit_mode(context,event) File "AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\coa_tools\operators\edit_mesh.py", line 1367, in exit_edit_mode bpy.types.SpaceView3D.draw_handler_remove(self.draw_handler, "WINDOW") ValueError: callback_remove(handle): NULL handle given, invalid or already removed

location: :-1

location: :-1

This happens when I either start cutting with the knife tool or when I hover over the 3d view while editing a mesh. This doesn't happen everytime if I figure out the cause exactly I'll update this.

Edit: Seems if I've already added a mesh to a sprite it will crash upon my mouse entering the 3d view in mesh edit mode. but if I'm trying to edit a new sprite it will wait till I click with the knife tool then crash. By crash I mean it will close mesh edit and show error. blender is fine.

[RobertBalogh]

I have a same issue. I tried apply this add on from file and by pithon. Neither has succes with it. I hope someone can help me with it. Many thanks for your hard work guys.

[ndee85]

Could you provide a file which I can look into?