Now, I have been running Gaussian 9.0 for PDI C5 DFT Raman calculation, but it is showing the text below repeatedly.

Petite list used in FoFCou.

Requested convergence on RMS density matrix=1.00D-08 within 128 cycles.

Requested convergence on MAX density matrix=1.00D-06.

Requested convergence on energy=1.00D-06.

to Integral accuracy reduced to 1.0D-05 until final iterations.

Can you suggest me which Basis sets or Methods would work for calculating Raman for structures like PDI C5 and PDI C8??