Supported IMS calls

IMS Batch Terminal Simulator intercepts all IMS calls from the application program.

Subsections:

EXEC DLI commands and limitations

IMS Batch Terminal Simulator supports the EXEC DLI application to use EXEC DLI commands, which read and update DL/I databases. However, it does not support a program that runs as an online CICS® program using DBCTL.

When multiple transactions are run by one JOB in a DBB region (that is, KW=DBB), you must reattach the IMS system, because IMS Batch Terminal Simulator must reattach the IMS region controller for each transaction, and thereby IMS Batch Terminal Simulator must get a fresh copy of the PSB.

Related reading: For the command specification to reattach the IMS region controller, see ./E command.

The following commands are not reported on BTSOUT or displayed on TSO screen, because they are not passed to IMS Batch Terminal Simulator.
  • QUERY
  • RETRIEVE

DL/I synchronization

An application program sync point results in committing the database changes made up to that point and resetting any database positioning. A sync point results from a CHKP call, a GU to the I/O PCB, or an application program return.

AIB interface

IMS Batch Terminal Simulator supports DL/I calls that use the Application Interface Block (AIB) interface.

For an ICAL DL/I call that uses the AIB interface, IMS Batch Terminal Simulator traces AIB information, the request area, and the response area. The I/O area and SSA information are not traced because they do not exist.

For the other DL/I calls that use the AIB interface, IMS Batch Terminal Simulator traces AIB information in addition to the I/O area and SSA information.

CEE/CEL interface

IMS Batch Terminal Simulator supports DL/I calls that use the Common Execution Environment (CEE) / Common Execution Library (CEL) interface. As a part of CEE/CEL interface support, IMS Batch Terminal Simulator allows the use of PSBs generated by the PSBGEN with LANG= (blank) option.