User get new Terminal ID but TSO rejects him after reconnection

Document ID : KB000095176
Last Modified Date : 18/05/2018
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Question:
What can I do if a re-logon after the connection to an application was lost fails with messages
"Terminal security violation...enter Yes to continue"
and
"terminate session Y No to disallow"
Answer:
Do not use the combination in ACT: A Mask for virtual terminals AND “Masking done for security:" set to 'Y'.
When using a Mask for virtual terminals for the application in the ACT make sure that “Masking done for security:" is set to 'N'.