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

• An mvslogout command for the same z/OS host has been entered from the same client platform. See mvslogout 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.