How do I dynamically add additional virtual terminals to my TPX?

Document ID : KB000028308
Last Modified Date : 14/02/2018
Show Technical Document Details

Question:

How do I dynamically add additional virtual terminals to my TPX?  We are running out of available ACBs with some users getting error message NO ACB AVAILABLE.

Answer:

  1. Build a VTAM member to define the additional GROUP and/or UNIQUE virtual terminals.  For example, create member TPXNEW in the library defined in the TPX VTAMLST DD statement:

    TPXNEW VBUILD TYPE=APPL
    *TPX,UNIQUE DO NOT REMOVE - THIS COMMENT IDENTIFIES UNIQUE VIRT TERM
    *
    Z44IJSU0 APPL MODETAB=ISTINCLM,DLOGMOD=T3278M2,SRBEXIT=NO,EAS=1
    Z44IJSU1 APPL MODETAB=ISTINCLM,DLOGMOD=T3278M2E,SRBEXIT=NO,EAS=1
    Z44IJSU2 APPL MODETAB=ISTINCLM,DLOGMOD=T3278M3,SRBEXIT=NO,EAS=1
    *     END OF UNIQUE VIRTUAL TERMINALS
    *
    *TPX,GROUP DO NOT REMOVE - THIS COMMENT INDENTIFIES GROUP VIRT TERM
    *
    Z44IGRU0 APPL MODETAB=ISTINCLM,DLOGMOD=T3278M2,SRBEXIT=NO,EAS=1
    Z44IGRU0 APPL MODETAB=ISTINCLM,DLOGMOD=T3278M2E,SRBEXIT=NO,EAS=1
    Z44IGRU0 APPL MODETAB=ISTINCLM,DLOGMOD=T3278M3,SRBEXIT=NO,EAS=1
    *     END OF GROUP VIRTUAL TERMINALS*



  2. Vary the new member ACTIVE in VTAM.
  3. IN TPXOPER, issue the VTADD command (VTADD TPXNEW) to add the newly created VTAM member TPXNEW.

Additional Information:

TPX Operator Guide - VTADD Command