Knowledge Base

Cancelling APPC RECEIVE_AND_POST Causes SNA Event ID 95

Article ID: 180789

Article Last Modified on 3/21/2005

APPLIES TO

This article was previously published under Q180789

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.

Keywords: kbprb KB180789


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