Tree quota error

I am applying tree quota on number of tree folders. but at the time of execution, for some folders it is giving below error-

Can't open mount-point file: /nas/server/server_1/quotas_fs_file!!
Error 5007: server_2: /nas/sbin/edquota -t -b 1024000 -s 1000000 /nas/server/server_1/quotas_fs_file /nas/server/server_1/quotas_uid_file .etc/rpt_file /nas/server/server_1/quotas_cfg_file: : exec failed

Please advice.