IEF240I

xx

Explanation
A job step specified more DD statements than the
system can process and/or a job step specified more units than the
system can process. In the message text: jobname
The name of the job.
procstep
The name of the step in the procedure.
stepname
The name of the job step.
xxxxK
The maximum size of the task input/output table (TIOT).

The maximum number of DD statements may be exceeded
for one of two reasons: the step JCL explicitly requested too many
DD statements and units, or the system generated DD statements and
units beyond those explicitly requested.
Additional DD statements
are generated when:All members of a generation data group (GDG) are requested. A
DD statement is generated for each member.
A private catalog is needed to locate or catalog a data set. A
DD statement is generated for the catalog if it was not defined in
a JOBCAT or STEPCAT DD statement.
A VSAM data set requires multiple device types. A DD statement
is generated for each additional device type.
JOBCAT or JOBLIB DD statements are associated with the job. The
applicable DD statements are generated for each step.

Four bytes are required in the TIOT for each unit to which
a DD statement is assigned. Specifying a large number of units, either
implicitly by a data set having a large number of volumes, each of
which requires a separate unit (for example, many DASD volsers in
the catalog or many SMS candidate volumes), or explicitly, can cause
the  TIOT to exceed its maximum allowable size.
The system sometimes
increases the total number of units associated with a step by overriding
JCL requests for volumes to share the same unit. This occurs when
one of the volumes is not eligible for demounting:
A volume has the permanently resident or reserved attribute.
A volume is required by multiple DD statements, unless UNIT=AFF
is specified for tape devices.

For more information, see the TIOT parameter in the ALLOCxx parmlib
member in z/OS MVS Initialization and Tuning Reference.

System action
The system ends the job.

Programmer response
The total number of DD statements and units
for the step must be reduced. If all data sets are not needed simultaneously,
consider using dynamic allocation facilities.

Source
Allocation

Module
IEFAB4FC

Routing code
11

Descriptor code
-