CICS - Wikitechy

What is an AICA abend ?

Editor — Tue, 13 Jul 2021 06:19:45 +0000

A task has been executing for longer than the runaway time interval (defined by the ICVR operand on the system initialization table macro, DFHSIT) without giving up control.
The runaway task condition indicates a possible loop in the application.

Editor — Tue, 13 Jul 2021 06:15:40 +0000

An EXEC CICS command has been issued that is not supported by the EXEC interface program DFHEIP.
A transaction has issued an EXEC CICS command which is supported in principle by the EXEC interface program DFHEIP, but for which the prerequisite function has not been included in the current CICS start-up.
A non-CICS command has been issued by an application stub (expansion of a DFHRMCAL macro), and the program DFHERM has detected that the required non-CICS support is not available. For example, an attempt to access DB2 when a DB2CONN resource is not enabled results in this abend.
An attempt has been made to use remote resources, but the local SYSID has been specified in an EXEC CICS command, or vice versa.
An attempt has been made to use remote resources, but ISC is not supported.
An EXEC CICS command contains an invalid AID or CONDITION identifier. This abend indicates that the EXEC CICS command has become corrupted.

Editor — Tue, 13 Jul 2021 06:11:51 +0000

The TYPE=DSECT assembly is used to produce a series of data structures, collectively called the symbolic map set.
The output of a TYPE=DSECT assembly is a series of data structures, coded in the source language specified in the LANG option. There is a structure for each map used for input, called the symbolic input map, and one for each map used for output, called the symbolic output map.
Symbolic map sets are used at compile (assembly) time. You copy them into your program, and they allow you to refer to the fields in the maps by name and to pass the variable data in the form dictated by the physical map set.
Symbolic map sets are typically stored in the library your installation defines for source code that gets copied into programs. Member names are typically the same as the map set names, but they need not be.
You need the TYPE=DSECT assembly before you compile or assemble your program. You can defer the TYPE=MAP assembly and link-edit until you are ready to test, because the physical map set is not used until execution time. But, you must do both eventually, many installations provide a cataloged procedure to do this automatically.
The procedure copies the source file for the map set and processes it once using TYPE=MAP and again using TYPE=DSECT. You also can use the SYSPARM option in your assembler procedure to override the TYPE value in a particular assembly.

BMS is known as Basic Mapping Support. An application consists of formatted screens which act as a link between the terminal and the CICS programs. For communication to occur between the terminal and the CICS programs, we use CICS terminal input/output services. We use BMS to create screen designs with proper positions and attributes. Following are the functions of BMS,
- BMS acts as an interface between the terminal and the CICS programs.
- The design and format of the screen is separate from the logic of application.
- BMS makes the application hardware independent.

Editor — Tue, 13 Jul 2021 06:06:21 +0000

In this CICS reserved word we use usually in the subroutine, that say, we are calling a sub-program, and passing some data.
We don’t know whether data is received or not. So, I am getting some data from the screen passing to first main program and next to sub-program. With this variable we can test it and control the program logic.

EVALUATE TRUE

     IF  EIBCALEN = 0

           EXEC  CICS

           RECEIVE  INTO(WS-RECORD)

           END-EXEC

    END-IF

END-EVALUATE