Systems support can use the JMS statement in the parameter file to specify whether only numeric characters or also alphanumeric characters may be allocated by the system for the 2nd to 4th places of a user TSN during the subsequent session. If the mode is to be switched from alphanumeric to numeric in two consecutive sessions, system initialization can only be performed with a cold start. In this case the operator receives a corresponding message on the console.
The keyword for specifying the TSN mode is JMS.
The maximum number of permissible parameter records is 16.
Format of the parameter record for defining the TSN mode
TSN-MODE = A[LPHANUMERIC] / N[UMERIC] |
TSN-MODE = ALPHANUMERIC
This declares that the system may also use alphanumeric characters for the 2nd to 4th places of a TSN.
If no value or an incorrect value is set for TSN allocation in the parameter file, this mode becomes effective for the session by default.
TSN-MODE = NUMERIC
This declares that the system may only allocate numeric characters for the TSN of a user task. If this mode follows a session in which alphanumeric characters were allocated, system initialization can only be performed with a cold start.
Extract from the parameter file
/BS2000 PARAMS : /BEGIN JMS TSN-MODE=A 1. /EOF : /END-PARAMS
In the subsequent session the system may also allocate alphanumeric characters for the 2nd to 4th places of the TSN of a user task.