How to avoid error with PDB structures without H atoms?

[icamps]

Hello,

I am running some simulations with the input files in PDB format, ex. for CO2 gas, but the optimization step is failing with the error message:

########################################################################
[ERROR] Program stopped due to fatal error
-2- reading geometry input 'CO2.pdb' failed
-1- io_reader_readMolecule: PDB structure without hydrogen atoms found, aborting due to incomplete input geometry
########################################################################

I prefer the calculations using the PDB format, because the last step is a molecular dynamic which results are easily analyzed when the trajectory is in PDB format (with the corresponding fragments names added).

[icamps]

Any ideas about this?