Insufficien virtual memory error

[Benoit Braïda]

Dear Fuming,

I have an XMVB calculation which crashes with the error "Insufficient virtual memory". It is a VBSCF calculation on a relatively large molecule, on my usual cluster. This error does not usually occur. 

Is there some way to avoid it? Would increasing the "OMP_STACKSIZE" help (I have set it up to 5G)?

All the best,

Benoît