Running this test with MFiX 25.1.1 (on Windows) I get
Error from des/read_particle_input.f:2405
The expected number of columns does not match the actual number of columns in particle_input.csv,
expected number of columns = 39,
number of columns in file = 14.
Iām not sure where that 39 is coming from, but this is a problem I will follow up on this.