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II07581: D U,,ALLOC GIVES MSGIEE106I *UNKNOWN (UNKNOWN) MVS DISPLAY ALLOCATED UNITS COMMAND

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APAR status

  • Closed as canceled.

Error description

  • In response to a  D U,,ALLOC command, msgIEE106I is issued
indicating a jobname of *UNKNOWN for certain DASD units.  It is
also not possible to Vary the unit(s) offline (unable to vary).
   This problem was traced to an OEM product changing the UCB
in a job's TIOT without incrementing the new UCB's UCBUSER
(Number of Current Users use-count) field.  When the new UCB
was subsequently de-allocated, MVS Allocation code decremented
UCBUSER, causing it to become negative.  Since UCBUSER was then
not zero, the device appeared to be allocated even though there
was no address space known to be allocated to it.  As a result,
UCBALOC was never turned off and the device could not be
varied OFFLINE.

     See Scratch Pad for OEM information.
     See also II07610.

Local fix

  • See Scratch Pad for OEM fix number.

Problem summary

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Problem conclusion


    

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Temporary fix


    

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Comments


    

  • Closing info APAR for 5752SC1B4.

    



APAR Information




    

  • APAR number
    II07581
    • 

  • Reported component name
    V2 LIB INFO ITE
    • 

  • Reported component ID
    INFOV2LIB
    • 

  • Reported release
    001
    • 

  • Status
    CLOSED  CAN
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    1994-02-04
    • 

  • Closed date
    1994-02-08
    • 

  • Last modified date
    2001-01-18
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

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  • APAR is sysrouted TO one or more of the following:
    

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Fix information


    



Applicable component levels


    








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            14 December 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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