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APAR status

  • Closed as canceled.

Error description

  • MSGIEF506I occurred stating that there were no storage volumes
    to allocate to temporary datasets, however, there were a number
    of 3380 D/T3380 DASD devices that were online, ready, and
    mounted as storage volumes.  Also, trying to submit a job
    through ISPF received a message indicating that ISPF could not
    allocate the control dataset for the submitted JCL.  Jobs
    submitted through batch worked when specifying temp datasets
    that contained UNIT information on the JCL statement.
    Additional Symptoms:
         MsgIKJ56221I Volume necessary to satisfy your request not
                      on system and cannot be mounted .
         MsgIKJ58508I Dataset Not Allocated System or Installation
         msgIKJ56223I Space Request Denied by Installation Exit,
                      Installation Exit Reason Code IS X'nnnn'
    SVC99 ALLOCATE  RC0218 rc021C msgIEF290E IEF290E EDIT &EDIT
    See Responder's Text of this Info APAR for further information.
    See, also, the responder's Text of OW21591.
    Beware: The 'LISTU userid TSO' command may not work on all
    systems, you may need to use 'LISTUSER userid TSO'
    Additional Keywords:

Local fix

Problem summary

Problem conclusion

Temporary fix


  • When a DYNAMIC allocation is being performed and UNIT
    information is required but not specified (no DALUNIT text
    unit) then the system defaults the unit required.
         If the dynamic allocation is being done under TSO in
    Foreground, then the system will use the default unit from
    the PSCB (Protected Step Control Block), which may contain
    information from SYS1.UADS or the TSO segment of a security
    system's (such as RACF) file.
         If the PSCB does not contain a default unit OR if the
    dynamic allocation is NOT being done under TSO running in the
    foreground, then:
           - the system will use the default unit specified in the
             ALLOCXX parmlib member (or the allocation default
             CSECT IEFAB445 for pre-MVS 4.1.0 (R410) systems).
      ==>  - For *NON* SMS managed data sets with DISP = NEW or
             MOD, SMS will then OVERRIDE the dynamic allocation
             default unit with the SMS default unit specified in
             the SMS Source Control Data Set (SCDS).
         For batch processing (i.e., JCL DD statement allocations),
    SMS will supply the default unit from the SMS Control Data Set
    for NEW or MOD requests which have no UNIT coded.  You may get
    msgIEF210I when an invalid unit is included in the SMS Source
    Control Data Set or when there is no active SMS configuration.
    Summary of the above "where defaults are taken from":
           - SMS-managed dataset
              o dynamic allocation -- ACS routines decide
              o batch   allocation -- ACS routines decide
           - non-SMS-managed dataset
              o dynamic allocation
                + TSO in Foreground -- Default comes from TSO
                                       segment of RACF or other
                                       security system's file, or
                                       SYS1.UADS if no TSO segment,
                                       or SCDS if no SYS1.UADS info,
                                       or ALLOCxx if no SCDS info.
                + all else          -- Default comes from SCDS
                                    --Default comes from ALLOCxx if:
                                           o  DISP = SHR or OLD, or
                                           o  If no SCDS info
              o batch   allocation  -- default comes from SCDS.
    Note to Level 2: If the customer absolutely needs to change the
                     default UNIT value in his ALLOCxx member, see
                     the Scratch Pad for an UNSUPPORTED, USE-AT-
                     YOUR-OWN-RISK method of doing that.  Since
                     there is currently no "SET ALLOC=" command to
                     change any ALLOCxx values, this is the only
                     way such a change can be accomplished.
    Note: If the default UNIT parameter which Allocation retrieves
          is invalid (for example if the defaulted UNIT is not in
          the EDT), that defaulted UNIT parameter will be error
          flagged and the allocation failed IF AND ONLY IF that
          UNIT parameter is REQUIRED for the allocation.  If the
          default UNIT is "thrown away" by Allocation (as it would
          be for DISP=SHR or OLD datasets) then the invalid default
          UNIT parameter will not be error flagged.
         To verify the SCDS parms, you may enter SMS via ISMF.  You
    must be a Storage Administrator, so you may need to select
    option 0.0 and select #2 for Storage Administrator (versus #1
    for User Mode).  Exit and re-enter ISMF and select option 8,
    CONTROL DATA SET section.  Select option 1 to DISPLAY the
    configuration and the next panel will show the default unit.
    This may be a generic (eg. 3380) or an esoteric (eg. SYSDA).
    You may be seeing an 'error' in device allocation if the
    devices being allocated are not included in the default unit
    group.  This default unit specification is the group of devices
    that will be used when unit info is required but not provided
    on the allocation request.  It does NOT indicate which devices
    SMS is to default to for SMS managed datasets.
         The default unit could also be specified in the ALLOCxx
    parmlib member.  Check this member and look for the
    UNIT NAME(unit-name)  statement and change it accordingly.
         You can check for the default RACF UNIT (TSO segment) by
    issuing the 'LISTU userid TSO' command.  This will display
    the UNIT default for the userid.
         ISPF has its own default for allocations done via option
    3.2 A (ISPF32 ISPF32A), which is stored in the ISPF Configur-
    ation table.  Information about the IBM-supplied default and
    how to modify it (and other options) using the ISPF Configur-
    ation Utility is discussed in detail in the ISPF Planning and
    Customizing manual (SC28-1298), Chapter 4 (Customizing PDF),
    Section 4.12 (The ISPF Configuration Table).  The keyword whose
    default value you'll want to change is PDF_DEFAULT_UNIT.
         Customers who have older systems which do not have the
    ISPF Configuration Table and Utility should contact the IBM
    Support Center and ask for the comparable information for
    older systems which is on the Scratch Pad of this APAR.  It
    is not being included here in the main text of the APAR simply
    to avoid the potential problem of someone thinking that THAT is
    the current information.
         For datasets allocated with SDSF, see PN64879.

APAR Information

  • APAR number


  • Reported component name


  • Reported component ID


  • Reported release


  • Status


  • PE




  • Special Attention

    NoSpecatt / Xsystem

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Fix information

Applicable component levels

[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19N","label":"APARs - OS\/390 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"001","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M","label":"APARs - z\/OS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"001","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":null,"label":null},"Product":{"code":"SG19O","label":"APARs - MVS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"001","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSSN3L","label":"z\/OS Communications Server"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"001","Edition":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}}]

Document Information

Modified date:
13 December 2020