Errors in CCSD(T) calculations

I have been attempting to run a CCSD(T) calculations on a 20 atom system and i am receiving the following error:

Traceback (most recent call last):
File “/usr/local/anaconda/5.0.1-Python3.5-gcc5/envs/p4env/bin/psi4”, line 248, in
File “”, line 62, in
File “/usr/local/anaconda/5.0.1-Python3.5-gcc5/envs/p4env/lib//python3.6/site-packages/psi4/driver/”, line 460, in energy
wfn = procedures[‘energy’][lowername](lowername, molecule=molecule, **kwargs)
File “/usr/local/anaconda/5.0.1-Python3.5-gcc5/envs/p4env/lib//python3.6/site-packages/psi4/driver/procrouting/”, line 860, in select_ccsd_t_
return func(name, **kwargs)
File “/usr/local/anaconda/5.0.1-Python3.5-gcc5/envs/p4env/lib//python3.6/site-packages/psi4/driver/procrouting/”, line 2206, in run_ccenergy
ccwfn = core.ccenergy(ref_wfn)

Fatal Error: PSIO Error
Error occurred in file: /scratch/psilocaluser/conda-builds/psi4_1495014881710/work/psi4/src/psi4/libpsio/ on line: 105
The most recent 5 function calls were:

psi::PsiException::PsiException(std::__cxx11::basic_string<char, std::char_traits, std::allocator >, char const*, int)
psi::PSIO::wt_toclen(unsigned int, unsigned long)
psi::PSIO::tocwrite(unsigned int)
psi::psio_tocwrite(unsigned int)
psi::psio_error(unsigned int, unsigned int)

I am unsure what is causing this as I have run similar calculations that have succeeded. Any suggestions on how to solve this will be appreciated. Many thanks for taking the time to read this.

PSIO errors are notoriously unhelpful. Any way your disk could be filling up? Can you give the job more memory? I’d say post the input file, but it’s probably approximately right if other jobs have been running. density-fitted (fnocc; DePrince) or conventional (ccenergy; Crawford)?