Hello GAMESS users,

I am confused with the MEMDDI part in the GAMESS input.

Currently, I am calculating using 1 core (MWORDS = 4000). But, the calculation is very slow.

If I am increasing the number of cores, the error occurs,

" DDI Process 0: error code 911

DDI Process 0: Insufficient distributed memory,

unable to create DDI array number 2.

Previously created DDI arrays (numbered 0 to 1) consume 29 MWords.

DDI array 2 will require 919 MWords more.

Therefore, increase MEMDDI by at least 627 MWords. "

I have tried to use MEMDDI with different values, but none succeeded.

I am curious to know how to add MEMDDI and MWORDS in GAMESS input? How can I relate MEMDDI and MWORDS from RAM and Disk memory of the machine?

Any suggestion and discussion will be helpful for me. Please comment here.

Regards

Ranajit