failed ga create size=*********


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Adam,
I am not familiar with OpenMPI/IB errors you are getting (and you might have better responses on the OpenMPI mailing lists).
Anyhow, as far as the NWChem part is concerned,
1)I strongly recommend to set the value of the environmental variable ARMCI_DEFAULT_SHMMAX
ARMCI_DEFAULT_SHMMAX=2048
2) After reading your post, it is not clear what is the memory line you actually used ... is it
memory stack 1500 mb heap 100 mb global 2000 mb
?