## Supported HIPE versions

The filler is able to import data created by versions1 of the HIPE software equal or newer than 12. Older versions are rejected by CLASS. However, it is recommended to retrieve the latest Herschel-HIFI FITS files (version 14, expected mid-2016) from the Herschel Science Archive, as there were several fixes (e.g. missing keywords) added since the versions 12 and 13. This means the resulting spectra in CLASS will be incomplete (e.g. null values, in particular in the Herschel-HIFI section) or approximate for versions 12 and 13. If this happens, CLASS will issue warnings when it had to choose the default value for a parameter. Defaults are documented in the look-up tables in the Section .