| File | Sect. | I/O | Type | Description | 
| rhd.exe | 3.2 |  | executable | main program | 
| rhd.par | 5.3 | I | control/data: UIO | central control file | 
| rhd.stop | 5.4 | I | control | file to force controlled stop of simulation | 
| rhd.cont | 5.4 | I | control | file to force continuation after stop | 
| rhd.dump | 5.4 | I | control | file to request output of current model | 
| data.eos |  | I | data: UIO | tabulated equation of state | 
| data.opta |  | I | data | tabulated opacities | 
| rhd.sta | 5.1 | I | data: UIO | start model (e.g. end file of last run) | 
| rhd.done | 5.4 | O | status | exit status: written if run was successful | 
| rhd.end | 5.1 | O | data: UIO | end model | 
| rhd.full | 5.1 | O | data: UIO | sequence of (2D or 3D) snapshots, large | 
| rhd.mean | 5.2 | O | data: UIO | derived data: mean flux, intensity | 
| rhd.snap | 5.4 | O | data: UIO | file with model snapshot if requested | 
| rhd.out | 5.5 | O | data: text | human readable text output | 
| data.dat | 5.6 | I | data: text | chemical reaction data | 
| data.atom | 5.7 | I | data: text | HION data file (model atom) | 
| edens.dat | 5.7 | I | data: UIO | HION data file(electron density table) | 
| abundance.input | 5.7 | I | data text | HION data file(abundances) | 
| pf_kurucz.dat | 5.7 | I | data: UIO | HION data file(partition functions) | 
| HION.time.H.*.out | 5.8 | O | data: UIO | HION: additional output | 
| HION.step.H.*.out | 5.8 | O | data: UIO | HION: additional output |