Please share the permissions of /var/spool/pbs/mom_priv ( after when an interactive job is running).
The permission on my system is as below:
[root@compute_node ~]# namei -mo /var/spool/pbs/spool/
f: /var/spool/pbs/spool/
dr-xr-xr-x root root /
drwxr-xr-x root root var
drwxr-xr-x root root spool
drwxr-xr-x root root pbs
drwxrwxrwt root root spool
[root@compute_node mom_priv]# namei -mo /var/spool/pbs/mom_priv/jobs
f: /var/spool/pbs/mom_priv/jobs
dr-xr-xr-x root root /
drwxr-xr-x root root var
drwxr-xr-x root root spool
drwxr-xr-x root root pbs
drwxr-x–x root root mom_priv
drwxr-x–x root root jobs