SNA Client Sessions Are Unexpectedly Returned to Logon Screen (326563)


The information in this article applies to:

  • Microsoft SNA Server 4.0
  • Microsoft SNA Server 4.0 SP1
  • Microsoft SNA Server 4.0 SP2
  • Microsoft SNA Server 4.0 SP3
  • Microsoft SNA Server 4.0 SP4
  • Microsoft Host Integration Server 2000
This article was previously published under Q326563

SYMPTOMS

When using Rumba for Microsoft Windows 95, Windows 98, Windows 98 Second Edition and Windows NT, or when using Rumba 2000 with Microsoft SNA Client to connect to a SNA Server or Host Integration Server, users are randomly kicked out of their CICS session and returned to the initial MSG10 logon screen.

The problem occurs most frequently when you type rapidly during data entry, and when you scroll through windows.

RESOLUTION

To obtain the most recent version of the PTF to resolve your issue, contact a NetManage Technical Support center:

NetManage - World Wide Support Offices
http://supportweb.netmanage.com/ts_main/office.asp
and reference issue #368452 in your communication.

MORE INFORMATION

Trace Statements

When this problem occurs, SNA application or node traces (Climsgx.atf, Nodemsgx.atf) typically show the following statements: 
  • FMI   ----------------------------------------------- 17:21:31.0691
FMI   48120001->01024902 FMI DATA
FMI                      NO ACK reqd Key:1 Seq:282 BCI ECI EBI CEI
FMI                      BBIUI EBIUI  Enter sent by Client to SNA Server.
FMI
FMI   ---- Header  at address 01195118, 1 elements ----
FMI   00050001 640E2C00 0501011A 01002301     <....d.,.......#.>
FMI
FMI   ---- Element at address 01BF0C80, start 4, end 15 ----
FMI   2C000000 00000390 A07DC87E              <,........}H~    >
FMI   ----------------------------------------------- 17:21:31.0691
FMI   01024902->48120001 FMIST ACKLUA
FMI                      Msg key:1 Sequence:179
FMI
FMI   ---- Header  at address 01194B34, 0 elements ----
FMI   01050001 60000000 000000B3 01002301     <....`.........#.>

  • Host Sends SNA Server End Bracket (EB). 
    DLC   ----------------------------------------------- 17:21:31.0691
DLC   01020701->05160000 DLC DATA
DLC                      DAF:01 OAF:05 ODAI:off Normal
DLC                      RQE FMD BC EC DR1 BB CD
DLC
DLC   ---- Header  at address 01195118, 1 elements ----
DLC   00050100 640F2C00 010500B3 01002301     <....d.,.......#.>
DLC
DLC   ---- Element at address 01BF0C80, start 10, end 15 ----
DLC   0390A07D C87E                           <...}H~          >

  • SNA Server sends Client End Bracket (EB) (sent by host). 
    DLC   ----------------------------------------------- 17:21:32.0082
DLC   05160000->01020701 DLC DATA
DLC                      DAF:05 OAF:01 ODAI:off Normal
DLC                      RQE FMD BC EC DR1 EB
DLC
DLC   ---- Header  at address 01195118, 1 elements ----
DLC   00050100 640F2C00 0501011B 01002301     <....d.,.......#.>
DLC
DLC   ---- Element at address 01BF0C80, start 10, end 12 ----
DLC   039040                                  <..@             >

  • Host sends SNA Server Bid Request. 
    FMI   ----------------------------------------------- 17:21:32.0082
FMI   01024902->48120001 FMI DATA
FMI                      NO ACK reqd Key:284 Seq:283 BCI ECI EBI CEI
FMI                      BBIUI EBIUI
FMI
FMI   ---- Header  at address 01195118, 1 elements ----
FMI   0005011C 640E2C00 0501011B 01002301     <....d.,.......#.>
FMI
FMI   ---- Element at address 01BF0C80, start 4, end 12 ----
FMI   2C000501 011B0390 40                    <,.......@       >
DLC   ----------------------------------------------- 17:21:32.0097
DLC   05160000->01020701 DLC DATA
DLC                      DAF:05 OAF:01 ODAI:off Normal
DLC                      BID    RQD DFC FI BC EC DR1
DLC
DLC   ---- Header  at address 01195118, 1 elements ----
DLC   00050100 640F2C00 0501011C 01002301     <....d.,.......#.>
DLC
DLC   ---- Element at address 01BF0C80, start 10, end 13 ----
DLC   4B8000C8                                <K..H            >

  • SNA Server sends client Bid Request (sent by host). 
    FMI   ----------------------------------------------- 17:21:32.0097
FMI   01024902->48120001 FMIST CTRL BID   REQ
FMI                      ACK required Msg key:284 FMHI BCI ECI RBI
FMI
FMI   ---- Header  at address 01195118, 1 elements ----
FMI   02011401 E0012C00 0501011C 01002301     <......,.......#.>
FMI
FMI   ---- Element at address 01BF0C80, start 4, end 13 ----
FMI   2C000501 011C4B80 00C8                  <,.....K..H      >

  • Client sends +RSP to Host's Bid Request. 
    FMI   ----------------------------------------------- 17:21:32.0097
FMI   48120001->01024902 FMIST CTRL BID   ACK	
FMI                      Msg key:284 FMHI BCI ECI RBI
FMI
FMI   ---- Header  at address 01195118, 1 elements ----
FMI   02021401 E0012C00 0501011C 01002301     <......,.......#.>
FMI
FMI   ---- Element at address 01BF0C80, start 4, end 13 ----
FMI   2C000000 011CCB80 00C8                  <,........H      >
FMI   ----------------------------------------------- 17:21:32.0097
FMI   01024902->48120001 FMIST CTRL BID   ACKLUA	
FMI                      Msg key:284 FMHI BCI ECI
FMI
FMI   ---- Header  at address 01195118, 0 elements ----
FMI   02051401 E0000000 0000011C 01002301     <..............#.>
  • SNA Server sends client's +RSP to host. 
    DLC   ----------------------------------------------- 17:21:32.0097
DLC   01020701->05160000 DLC DATA
DLC                      DAF:01 OAF:05 ODAI:off Normal
DLC                      BID    +RSP DFC FI BC EC DR1
DLC
DLC   ---- Header  at address 01194B34, 1 elements ----
DLC   01051C01 00012C00 0105011C 01002301     <......,.......#.>
DLC
DLC   ---- Element at address 01BEF48C, start 10, end 13 ----
DLC   CB8000C8                                <...H            >

  • Client sends SNA Server Enter Key with data.

    This causes the Bracket Violation to occur. Rumba Client already agreed with a +RSP host's BID req relinquish control to host. 
    FMI   ----------------------------------------------- 17:21:32.0113
FMI   48120001->01024902 FMI DATA
FMI                      NO ACK reqd Key:5121 Seq:284 FMHI BCI ECI
FMI                      EBIUI
FMI
FMI   ---- Header  at address 01195118, 1 elements ----
FMI   00051401 E0020000 0000011C 01002301     <..............#.>
FMI
FMI   ---- Element at address 01BEF48C, start 4, end 15 ----
FMI   2C000000 00000390 A07DC87E              <,........}H~    >
FMI   ----------------------------------------------- 17:21:32.0113
FMI   01024902->48120001 FMIST RSRC
FMI                      Credit:1
FMI
FMI   ---- Header  at address 01194B34, 0 elements ----
FMI   04050001 00012C00 0105011C 0100B500     <......,.........>

  • SNA Server sends Negative Acknowledgement (NACK-2) to client. 
    FMI   ----------------------------------------------- 17:21:32.0113
FMI   01024902->48120001 FMIST NACK-2
FMI                      Msg key:5121 Fail: NONCRIT  Err1:2003
FMI                      Err2:0000
FMI
FMI   ---- Header  at address 01195118, 0 elements ----
FMI   01041401 E0002003 00000114 01002301     <...... .......#.>

  • Host sends SNA Server Begin Bracket (BB) and End Bracket (EB). 
    DLC   ----------------------------------------------- 17:21:32.0425
DLC   05160000->01020701 DLC DATA
DLC                      DAF:05 OAF:01 ODAI:off Normal
DLC                      RQE FMD BC EC DR1 BB EB
DLC
DLC   ---- Header  at address 01195118, 1 elements ----
DLC   01051C01 00012C00 0501011D 01002301     <......,.......#.>
DLC
DLC   ---- Element at address 01BEF48C, start 10, end 12 ----
DLC   0390C0                                  <...             >
DLC   ----------------------------------------------- 17:21:32.0425
DLC   01020701->05160000 DLCST RSRC
DLC                      Credit:4
DLC
DLC   ---- Header  at address 01194B34, 0 elements ----
DLC   04050004 00012C00 0105011C 0100B500     <......,.........>

  • SNA Server sends Begin Bracket (BB) and End Bracket (EB) to Client. 
    FMI   ----------------------------------------------- 17:21:32.0425
FMI   01024902->48120001 FMI DATA
FMI                      NO ACK reqd Key:286 Seq:285 BCI ECI BBI EBI
FMI                      CEI BBIUI EBIUI
FMI
FMI   ---- Header  at address 01195118, 1 elements ----
FMI   0005011E 6C0E2C00 0501011D 01002301     <....l.,.......#.>
FMI
FMI   ---- Element at address 01BEF48C, start 4, end 12 ----
FMI   2C000501 011D0390 C0                    <,........       >

  • Host sends BID to SNA Server. 
    DLC   ----------------------------------------------- 17:21:32.0425
DLC   05160000->01020701 DLC DATA
DLC                      DAF:05 OAF:01 ODAI:off Normal
DLC                      BID    RQD DFC FI BC EC DR1
DLC
DLC   ---- Header  at address 01195118, 1 elements ----
DLC   04050004 00012C00 0501011E 01002301     <......,.......#.>
DLC
DLC   ---- Element at address 01BEF48C, start 10, end 13 ----
DLC   4B8000C8                                <K..H            >
FMI   ----------------------------------------------- 17:21:32.0441
FMI   48120001->01024902 FMIST RSRC
FMI                      Credit:1
FMI
FMI   ---- Header  at address 01195014, 0 elements ----
FMI   04050001 6C0E2C00 0501011D 01002301     <....l.,.......#.>

  • SNA Server sends BID Request to Client (sent by Host). 
    FMI   ----------------------------------------------- 17:21:32.0441
FMI   01024902->48120001 FMIST CTRL BID   REQ					
FMI                      ACK required Msg key:286 FMHI BCI ECI RBI
FMI
FMI   ---- Header  at address 01195118, 1 elements ----
FMI   02011401 E0012C00 0501011E 01002301     <......,.......#.>
FMI
FMI   ---- Element at address 01BEF48C, start 4, end 13 ----
FMI   2C000501 011E4B80 00C8                  <,.....K..H      >

  • Client sends -RSP to SNA Server regarding Begin Bracket (BB) and End Bracket (EB) request (sent by host) with a Negative Acknowlegement (Nack-1) error message and 0813 sense code. Client believes it still has the bracket to send data. 
    FMI   ----------------------------------------------- 17:21:32.0441
FMI   48120001->01024902 FMIST NACK-1
FMI                      Msg key:1 Sense1:2C00 Sense2:0105
FMI                      Sequence:285
FMI
FMI   ---- Header  at address 01195014, 1 elements ----
FMI   01030001 00012C00 0105011D 0100B500     <......,.........>
FMI
FMI   ---- Element at address 01BF0C80, start 4, end 16 ----
FMI   2C000000 011D8790 00081300 01           <,.....g......   >
FMI   ----------------------------------------------- 17:21:32.0441
FMI   01024902->48120001 FMIST ACKLUA		
FMI                      Msg key:1 Sequence:285
FMI
FMI   ---- Header  at address 01195014, 0 elements ----
FMI   01050001 60000000 0000011D 0100B500     <....`...........>

  • SNA Server sends -RSP regarding Being Bracket (BB) and End Bracket (EB) to host (sent by Client). 
    DLC   ----------------------------------------------- 17:21:32.0441
DLC   01020701->05160000 DLC DATA
DLC                      DAF:01 OAF:05 ODAI:off Normal
DLC                      -RSP FMD SD BC EC DR1 PI
DLC
DLC   ---- Header  at address 01195118, 1 elements ----
DLC   02010100 00012C00 0105011D 01002301     <......,.......#.>
DLC
DLC   ---- Element at address 01BEF48C, start 10, end 16 ----
DLC   87910008 130001                         <gj.....         >

  • Client sends -RSP to Host's Bid request to SNA Server. 
    FMI   ----------------------------------------------- 17:21:32.0441
FMI   48120001->01024902 FMIST CTRL BID   NAK1
FMI                      Sense1:2C00 Sense2:0501 Msg key:286 FMHI BCI
FMI                      ECI RBI
FMI
FMI   ---- Header  at address 01195014, 1 elements ----
FMI   02031401 E0012C00 0501011E 01002301     <......,.......#.>
FMI
FMI   ---- Element at address 01BEF48C, start 4, end 17 ----
FMI   2C000000 011ECF90 00081300 01C8         <,............H  >
FMI   ----------------------------------------------- 17:21:32.0441
FMI   01024902->48120001 FMIST CTRL BID   ACKLUA
FMI                      Msg key:286 FMHI BCI ECI
FMI
FMI   ---- Header  at address 01195014, 0 elements ----
FMI   02051401 E0000000 0000011E 01002301     <..............#.>

  • SNA Server sends -RSP to Host's bid req to host (from client). 
    DLC   ----------------------------------------------- 17:21:32.0441
DLC   01020701->05160000 DLC DATA
DLC                      DAF:01 OAF:05 ODAI:off Normal
DLC                      BID    -RSP DFC FI SD BC EC DR1
DLC
DLC   ---- Header  at address 01195118, 1 elements ----
DLC   02011E01 00012C00 0105011E 0100B500     <......,.........>
DLC
DLC   ---- Element at address 01BF0C80, start 10, end 17 ----
DLC   CF900008 130001C8                       <.......H        >
DLC   ----------------------------------------------- 17:21:32.0535
DLC   05160000->01020701 DLCST RSRC
DLC                      Credit:4
DLC
DLC   ---- Header  at address 01194B34, 0 elements ----
DLC   04010004 00012C00 0105011D 01002301     <......,.......#.>

  • Unbind sent to SNA Server from Host. 
    DLC   ----------------------------------------------- 17:21:32.0722
DLC   05160000->01020701 DLC DATA
DLC                      DAF:05 OAF:01 ODAI:off Exp.
DLC                      UNBIND RQD SC  FI BC EC DR1
DLC
DLC   ---- Header  at address 01194B34, 1 elements ----
DLC   02011E01 00012D00 0501E251 01002301     <......-...SQ..#.>
DLC
DLC   ---- Element at address 01BF0C80, start 10, end 14 ----
DLC   6B800032 01                             <k..2.           >

  • Close PLU sent by SNA Server to Client (originally sent by host). 
    FMI   ----------------------------------------------- 17:21:32.0722
FMI   01024902->48120001 CLOSE PLU  REQUEST
FMI                      Normal
FMI
FMI   ---- Header  at address 01194B34, 1 elements ----
FMI   01020100 E00E0000 0000E251 01002301     <..........SQ..#.>
FMI
FMI   ---- Element at address 01BF0C80, start 4, end 14 ----
FMI   2D000501 E2516B80 003201                <-...SQk..2.     >

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Modification Type:MinorLast Reviewed:5/5/2005
Keywords:kbinfo KB326563
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