IBM Support

JR44530: CRASH IN APPN.SYS

A fix is available

Communications Server for Windows, Version 6.1.3 -- Latest Fixpack

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APAR status

  • Closed as program error.

Error description

  • Communications Server for Windows
---------------------------------
Crash (blue screen) in appn.sys

Local fix

  • 



Problem summary


    

  • USERS AFFECTED: All

PROBLEM DESCRIPTION:
Crash in appn.sys

PROBLEM SUMMARY:
The root cause is triggered by certain start up sequences which
are all lead to CS/Win sending an ACTLU RSP with a TCP/IP
control vector (type 0x64). In some case the code (inside
appn.sys) corrupts the SNAPS messages which can actually corrupt
any part of the SNAPS dynamic memory  (buffers and control
blocks). The crash occurs at a later point in time (probably
within a few seconds) when the corrupted memory is accessed.

    



Problem conclusion


    

  • The source of the corruption has been identified and corrected.

    



Temporary fix


    

  • appn.sys

    



Comments


    

  • 



APAR Information




    

  • APAR number
    JR44530
    • 

  • Reported component name
    COMM SERV NT 6.
    • 

  • Reported component ID
    5639F2503
    • 

  • Reported release
    613
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2012-10-25
    • 

  • Closed date
    2012-11-15
    • 

  • Last modified date
    2012-11-15
    • 





    

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

    • 

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

    
JR44768 LI77303 LI77304 LI77305 IV40879
    

    • 



Fix information


    

  • Fixed component name
    COMM SERV NT 6.
    • 

  • Fixed component ID
    5639F2503
    • 



Applicable component levels


    

  • R613  PSY
       UP
    • 

  • R640  PSY
       UP
    • 








      
              
                            

              

              [{"Line of Business":{"code":"LOB35","label":"Mainframe SW"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSHQNF","label":"Communications Server for Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"613"}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            07 October 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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