+ WARNING: if these are different data sets, you might want to rename optics groups instead of joining them!
 + WARNING: if so, manually edit the rlnOpticsGroupName column in the optics_groups table of your input STAR files.
 + WARNING: if these are different data sets, you might want to rename optics groups instead of joining them!
 + WARNING: if so, manually edit the rlnOpticsGroupName column in the optics_groups table of your input STAR files.
 + WARNING: if these are different data sets, you might want to rename optics groups instead of joining them!
 + WARNING: if so, manually edit the rlnOpticsGroupName column in the optics_groups table of your input STAR files.