actually the hostname *hirakjyoti-HP-dx2480-MT-KL969AV *was already there in the /etc/hosts file : 127.0.1.1 hirakjyoti-HP-dx2480-MT-KL969AV On Tue, 5 Jan 2021 at 05:37, Tony Curtis via discuss <[email protected]> wrote:

On Jan 4, 2021, at 11:59 AM, Hirakjyoti Sarma via discuss < [email protected]> wrote:

Dear all, I get the following error while running LAMMPS on ubuntu *without an internet connection.*

*Invalid error code (-2) (error ring index 127 invalid)Invalid error code (-2) (error ring index 127 invalid)INTERNAL ERROR: invalid error code fffffffe (Ring Index out of range) in MPID_nem_tcp_init:373Fatal error in PMPI_Init: Other MPI error, error stack:MPIR_Init_thread(586)..............: MPID_Init(224).....................: channel initialization failedMPIDI_CH3_Init(105)................: MPID_nem_init(324).................: MPID_nem_tcp_init(175).............: MPID_nem_tcp_get_business_card(401): MPID_nem_tcp_init(373).............: gethostbyname failed, hirakjyoti-HP-dx2480-MT-KL969AV (errno 0)*

But if the PC is connected to internet LAMMPS successfully run. How can i solve the problem?

This looks like a local hostname resolution issue. Maybe you could just add your hostname (presumably “*hirakjyoti-……”)* to the localhost entry in /etc/hosts and then when offline you’d resolve over loopback? Assuming it’s a single machine.

tony

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