CCMAN2 has capabilities to run ground and excited state energy and property calculations on computer clusters and supercomputers using the Cyclops Tensor Framework1055 (CTF) as a computational back-end. To switch on the use of CTF, use the CC_BACKEND keyword. In addition, Q-Chem should be invoked with the -np nproc command line option to specify the number of processors for a distributed calculation as nproc. Consult Section 2.8 for more details about running Q-Chem in parallel.
Note: This option is not yet available in public release.