ORA-00344: error at Rman Restore Time.

RMAN> alter database open resetlogs;

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03002: failure of alter db command at 03/06/2014 15:41:50

ORA-00344: unable to re-create online log '/appltest/

applclone/db/apps_st/data/log01a.dbf'

ORA-27040: file create error, unable to create file

SVR4 Error: 2: No such file or directory

Additional information: 1

Though Path and permission is ok .