The particles VTK output data options for version 24.3 cannot be checked, the checkboxes are all gray, when using CGP model. The fluid VTK output data checkboxes are normal.

The particles VTK output data options for version 24.3 cannot be checked, the checkboxes are all gray, when using CGP model. The fluid VTK output data checkboxes are normal.
Ooops, that is indeed a problem! We will be issuing a bugfix release (24.3.1) next week which will fix this and a few other small problems. Thank you very much for reporting this problem, and sorry for the trouble.
– Charles
This was fixed in MFiX 24.3.1 (released yesterday) - thanks for the bug report.