NOVELL TECHNICAL INFORMATION DOCUMENT

TITLE:  Client drops ACK, session fails 
TID #:  2948439
README FOR:  spxack.exe

NOVELL PRODUCTS and VERSIONS:
NetWare 3.2
NetWare 3.12
NetWare 4.11
NetWare 4.2

ABSTRACT:

When running Pervasive Btrieve Win16 Requester version 6.15, the Btrieve client
returns Btrieve Status 95 errors when using SPX to a NetWare server. 



-----------------------------------------------------------------
DISCLAIMER
THE ORIGIN OF THIS INFORMATION MAY BE INTERNAL OR EXTERNAL TO 
NOVELL.  NOVELL MAKES ALL REASONABLE EFFORTS TO VERIFY THIS 
INFORMATION.  HOWEVER, THE INFORMATION PROVIDED IN THIS DOCUMENT 
IS FOR YOUR INFORMATION ONLY.  NOVELL MAKES NO EXPLICIT OR IMPLIED 
CLAIMS TO THE VALIDITY OF THIS INFORMATION.
-----------------------------------------------------------------


INSTALLATION INSTRUCTIONS:

There are two parts to the this solution:

 1. Install the SPXACKFX.NLM
 2. Get WBTICOMM.DLL from Pervasive Technical Support.

Applying both these fixes corrects the problem.


ISSUE: 

If the client does not recieve an SPX ACK packet, the client resends the data
packet, but the server ignores the resent data packet, since he has already
ACK'd it and has his ACK number set to the next expected sequence number from
the client. Communications fail, and the Btrieve client posts the Status 95
error.

There was a bug in SPX which is fixed with the new SPXACKFX.NLM. The
WBTICOMM.DLL fixes a problem where the Btrieve client overwrites the configured
SPX retry count with a value of 5, which is too short in some cases. 


Self-Extracting File Name: spxack.exe

Files Included            Size          Date            Time
..\
      SPXACK.TXT   (This file)  
    SPXACKFX.NLM          1163     2-22-1999      2:55:08 am



-----------------------------------------------------------------
Any trademarks referenced in this document are the property of their respective
owners.  Consult your product manuals for complete trademark information.
-----------------------------------------------------------------