Whenever read-write files get to about 20Gb, I get this error. I know that, in G09, one rw file is limited to 16Gb. So I have set the software to write several RWFs. But it still keeps producing this error... My input line and rwf line look like this:


#p opt freq=noraman rccsd/genecp nosymm

Any suggestions? Thank you in advance!

  • $\begingroup$ +1. Thanks for asking here, and good luck getting a quick answer! It's been years since I used Gaussian so hopefully a more frequent Gaussian user can help you. $\endgroup$ Jul 24, 2020 at 23:22
  • $\begingroup$ In general this error is due to lack of memory and/or disk space. Try to increase the memory in your input (using %mem=5Gb, for example). Also, are you able to create such "big" files? I mean, there are some hard disk partition types that not support single files greater that 2GB. $\endgroup$
    – Camps
    Jul 25, 2020 at 0:07
  • 2
    $\begingroup$ @Camps G09 often writes rw files a lot bigger than 2 Gb on my PC. As for %mem=5Gb, I'm short on RAM... $\endgroup$
    – QuantumX
    Jul 25, 2020 at 14:38
  • 3
    $\begingroup$ Maybe your RAM limitation is causing the problem. $\endgroup$
    – Camps
    Jul 25, 2020 at 14:40
  • 1
    $\begingroup$ You could probably post the update as a self-answer instead. $\endgroup$
    – Tyberius
    Jul 25, 2020 at 23:57

1 Answer 1


It turns out, splitting the scratch files doesn't help. I have a 32-bit version of Gaussian, and it has a 16Gb limit for the combined size of the scratch files (I don't know how I could miss that). So splitting the read-write file can't help here. Looks like I'll have to find better computational resources.

  • $\begingroup$ Consider upgrading to a new version, and if you want efficient CC, then maybe look into other programs. I'm sure there is already a q&a here for this. $\endgroup$ Jul 28, 2020 at 14:13
  • $\begingroup$ The question is quite old, but maybe it would be better to use #T instead of #P? $\endgroup$
    – XuMuK
    Jan 31 at 10:34

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .