Error: 'Nonetype has no attribute to_struct' when FLIP Fluids object is a Text Object Type

[luckychris]

happens in Blender 3.0 alpha and 2.92 and 2.93 as well

[luckychris]

you can checkout and reproduce the error with this blend file: https://www.dropbox.com/s/rxwa82or6gw0zwr/ff_bug.blend?dl=0

[luckychris]

system console output:

Traceback (most recent call last):
File "/Users/c/Library/Application Support/Blender/3.0/scripts/addons/flip_fluids_addon/bake.py", line 2441, in bake
__launch_bake(datafile, cache_directory, bakedata, savestate_id)
File "/Users/c/Library/Application Support/Blender/3.0/scripts/addons/flip_fluids_addon/bake.py", line 2428, in __launch_bake
__initialize_fluid_simulation(fluidsim, data, cache_directory, bakedata, savestate_id)
File "/Users/c/Library/Application Support/Blender/3.0/scripts/addons/flip_fluids_addon/bake.py", line 1368, in __initialize_fluid_simulation
data.force_field_objects = __add_force_field_objects(fluidsim, data, bakedata)
File "/Users/c/Library/Application Support/Blender/3.0/scripts/addons/flip_fluids_addon/bake.py", line 1341, in __add_force_field_objects
field_object.update_mesh_static(mesh)
File "/Users/c/Library/Application Support/Blender/3.0/scripts/addons/flip_fluids_addon/pyfluid/forcefield.py", line 42, in update_mesh_static
mesh_struct = mesh.to_struct()
AttributeError: 'NoneType' object has no attribute 'to_struct'

SIMULATION TERMINATED DUE TO ERROR:
'NoneType' object has no attribute 'to_struct'

Thank you for using FLIP Fluids!

[rlguy]

Thanks for the report! I am able to reproduce the issue.

The FLIP Fluid Volume Force type object (as well as Inflow/Outflow/Fluid/Obstacle) must be a Blender 'MESH' type object and this is what is causing the error. It looks like there is a bug that is causing a 'TEXT' type object to be able to be accepted as a FLIP Fluid object type where this is not supported.

Until this issue is fixed, a workaround can be to convert this object to a 'MESH' type object:

[luckychris]

thanks for your fast answer. Yes, indeed, converting to mesh helps.

[rlguy]

This issue has been fixed and will be available in the next experimental release on September 17, 2021.

If a text type object is set to a FLIP Fluid object type, a popup error will be displayed:

Popup windows will now be displayed for other unsupported object types as well: Metaballs, Fonts, Volumes, Armature Bones, Lights, Light Probes, Grease Pencils, Lattices, Cameras, and Speakers.