Ecce 6.2 doesn't officially support Gaussian 09 as far as I know. However, they are compatible enough for a wide range of tasks.
However, if you use nosymm you will not be able to see orbital occupancy:
#P rb3lyp/6-31++g** 5D 7F Opt=() Freq=() Punch=(MO) Pop=() scrf=(pcm, solvent=dichloromethane)
vs
#P rB3LYP/6-31++g** 5D 7F Opt=() Freq=() Punch=(MO) Pop=() scrf=(pcm, solvent=Dichloromethane) nosymm
However, if you use nosymm you will not be able to see orbital occupancy:
#P rb3lyp/6-31++g** 5D 7F Opt=() Freq=() Punch=(MO) Pop=() scrf=(pcm, solvent=dichloromethane)
vs
#P rB3LYP/6-31++g** 5D 7F Opt=() Freq=() Punch=(MO) Pop=() scrf=(pcm, solvent=Dichloromethane) nosymm
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