If you have successfully logged in and get the “Permission denied” message while trying to access data, that can be due to one of the following cases:

• An mvslogout command for the same z/OS host has been entered from the same client platform. See the description of mvslogout in Using commands on the z/OS NFS client for details.
• Your z/OS user ID has been automatically logged out because the logout attribute value has been exceeded. This can happen when you leave the client idle for too long. Enter the mvslogin command again, and start your processes again. To find out how many seconds you can stay logged in while your client is idle, issue the showattr command and look at the logout attribute.
• Another mvslogin to the same z/OS host using the same z/OS ID has been entered from the same UID and the same client platform. If this is the case, retry your access.
• In multi-homed environments where a system has more than one network interface, the remote IP address specified in the mount command should match the remote IP address specified in the mvslogin and mvslogout. Note that a loopback IP address and the real IP address for the same system are considered separate IP addresses and therefore require the mount command and mvslogin/mvslogout to have matching IP addresses.
• The z/OS NFS server has been re-started. Enter the mvslogin command again, and start your processes again.