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Further to my earlier posts on the captioned subject, the calculations are running fine in parallel mode on a compute cluster where VASP has been installed using openmpi.
Moreover, it compares well with the results obtained on some other cluster where VASP is installed differently (using impi).
However, I have been getting the following error messages in the error file in the former case.
I guess, we can safely disregard these error messages.

Your kind suggestions will be most sincerely appreciated.
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libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs0
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs0
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs0
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs0
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs0
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs0
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs0
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs0
[compute-15-32.local:08824] 7 more processes have sent help message help-mpi-btl-base.txt / btl:no-nics
[compute-15-32.local:08824] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages
[compute-15-32.local:08824] 7 more processes have sent help message help-mpi-btl-usnic.txt / check_reg_mem_basics fail
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Hi,

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