Do not register NetCDF format if it is not available
Do not register NetCDF format if it is not available

chemfiles/chemfiles,lscalfi/chemfiles,chemfiles/chemfiles,Luthaf/Chemharp,Luthaf/Chemharp,Luthaf/Chemharp,chemfiles/chemfiles,lscalfi/chemfiles,lscalfi/chemfiles,lscalfi/chemfiles,chemfiles/chemfiles