I have calculated and made output file form Gaussian 09. By using GaussSum, log file was opened and chosen orbitals option and after picked the DOS option. It will create the DOS spectrum. Up to this, everything is fine. For PDOS, it is mandatory to create groups.txt file in the same gausssum3 directory. Whenever, I tried it to open, the software displays an error message. For convenience, I am attaching my log and chk file .
please someone create group.txt file of attached file. Your suggestion is valuable to me.