Cancelling APPC RECEIVE_AND_POST Causes SNA Event ID 95

ID: Q180789

The information in this article applies to:

Microsoft SNA Server, versions 2.0, 2.1, 2.11, 2.11 SP1, 2.11 SP2, 3.0, 3.0 SP1, 3.0 SP2, 4.0

SYMPTOMS

The following event may occur when an APPC application cancels a [MC_]RECEIVE_AND_POST function by calling TP_ENDED:


  Source: SNA APPC Application
  Event ID: 95
  Description:  APPC given bad event handle or callback address 00000006

The following SNA Server APPC Application traces were captured when this problem occurred:


   APPC  ---------------------------------------------------------------
   APPC  MC_RECEIVE_AND_POST request
   APPC
   APPC  Type:Sync                                  VerbID:00084000
   APPC
   APPC  ---- Verb Parameter Block at address 0138F34C ----
   APPC  0D000100 00000000 00000000 00000000     <................>
   APPC  00A87700 80A97700 00000100 00000800     <.yw..zw.........>
   APPC  00000000 58270900 94020000 00000000     <....X'..m.......>
   APPC  ---------------------------------------------------------------
   APPC  MC_RECEIVE_AND_POST response, result = OK
   APPC
   APPC  Type:Sync                                  VerbID:00084000
   APPC
   APPC  ---- Verb Parameter Block at address 0138F34C ----
   APPC  0D000100 00000000 00000000 00000000     <................>
   APPC  00A87700 80A97700 00040101 00000400     <.yw..zw.........>
   APPC  00000000 6EAA7700 94020000 00000000     <....n.w.m.......>
   APPC  ---------------------------------------------------------------
   APPC  TP_ENDED request
   APPC
   APPC  Type:Sync                                  VerbID:00028000
   APPC
   APPC  ---- Verb Parameter Block at address 0138F090 ----
   APPC  13000000 00000000 00000000 00000000     <................>
   APPC  00A87700 01000000                       <.yw.....        >
   APPC  ---------------------------------------------------------------
   APPC  ***UNKNOWN VERB*** response, result = DEALLOC_ABEND
   APPC
   APPC  Type:Async   Method:Post   Hwnd:0138F398   VerbID:00084000
   APPC
   APPC  ---- Verb Parameter Block at address 0138F34C ----
   APPC  20F43801 0005                           < 48...          >
   APPC  ---------------------------------------------------------------

CAUSE

The APPC application was deallocating the verb control block (VCB) that it had passed to the [MC_]RECEIVE_AND_POST function prior to calling TP_ENDED. This caused an error when the APPC interface attempted to set the event handle indicating final completion of the [MC_]RECEIVE_AND_POST VCB.

RESOLUTION

The APPC application should maintain the state of the RECEIVE_AND_POST VCB until the function has fully completed.

Additional query words:

Keywords : prodsna snaappc snaprog
Version : WINDOWS:2.0,2.1,2.11,2.11 SP1,2.11 SP2,3.0,3.0 SP1,3.0 SP2,4.0
Platform : WINDOWS
Issue type : kbprb