TSO-Option PASSWORDPREPROMPT can affect Logon scripts with TPX

Products

• TPX - Session Management
• Vman Session Management for z/OS

Issue/Introduction

Starting with z/OS 2.2, there is an option for TSO available, PASSWORDPREPROMPT={ON|OFF} with OFF being the Default.
When activating that option by specifying PASSWORDPREPROMPT=ON in the LOGON-Statement of the SYS1.PARMLIB member IKJTSOnn you need to enter Userid and Password in a different way than previously. This has an effect on possible Script-procedure used to automate Logon to TSO. If the provided combination of Userid and Password is incorrect, you are logged out of the session.

So you will not see the old Logon screen after entering the userid alone:

  ---------------------------- TSO/E LOGON -------------------------- 
  Enter LOGON parameters below: RACF LOGON parameters: 
  Userid ===> xxxxxxx 
  Password ===>                   New Password ===> 
  Procedure ===> pppppppp         Group Ident ===> 
  Acct Nmbr ===> nnnnnnnn 
  Size ===> 2048 
  Perform ===> 
  Command ===>

  Enter an 'S' before each option desired below: 
  -Nomail -Nonotice -Reconnect -OIDcard
  -------------------------------------------------------------------

Instead of this panel you see this line:

 IKJ56700A ENTER USERID –

After entering your userid you see this:

IKJ56700A ENTER USERID -
 xxxxxx             
IKJ56476I ENTER PASSWORD

After entering the correct password, you are logged on to TSO.

Environment

TPX® Session Management for z/OS

Resolution

For TPX this Option requires you to check your ACL script used for logon to TSO. It likely needs to be changed due to the changed data flow between terminal and TSO. A good approach is to:

1. Logon to TSO without the ACL being active (Use line command 'g' instead of 's' in the Main Menu) 
2. Trace all input from the terminal and all panels received from TSO
3. Finally rewrite the ACL.