Help, Problem with SAPT calculation

Please follow the guidelines for posting topics. Without an input file, it is very difficult to help you. Having the output, or at least a Psi4 version number, would make it easier.

PSIO errors are related to input and output and often mean that there aren’t enough computational resources to complete the calculation. You should check that you’re providing the computation with adequate memory, that your Psi4 version is 1.3.2 or newer, and what your scratch space is.