SNA Server Event 563 and Win 3.x Client Application ProblemsLast reviewed: February 1, 1996Article ID: Q137901 |
The information in this article applies to:
SYMPTOMSThe following symptoms can occur when 15 or more SNA Servers are installed within a single Windows NT domain and Windows 3.x clients are being used:
CAUSEThe SNA Server Windows 3.x client software supports sessions through multiple SNA Servers. However, if there are more than 14 SNA Servers currently running in the SNA Server domain, Win 3.x clients begin experiencing these problem due to an internal limit within the SNA Server Windows 3.x client service table. The service table is used by the SNA Server client to internally manage the SNA client resources being used on the client machine. The SNA Server Win 3.x client service table contains 32 entries:
RESOLUTION Microsoft has updated the following files to correct this problem:
<snaroot>\WNAP.EXE WINDOWS\SYSTEM\WDMOD.DLLNOTE: These files are applied to the SNA Server Windows 3.x client, not the SNA Server. The update to the SNA Win 3.x client software limits the number of configuration servers kept in the service table to 2 entries. This extends the theoretical number of SNA Servers supported in a domain to 27. However, Microsoft strongly recommends that SNA Server 2.11 be deployed and the subdomain feature implemented, allowing SNA Servers to be separated into logical groups within a Windows NT domain. Using the subdomain feature, the client users would connect only through one group of servers at a time. See the SNA Server 2.11 Readme file for more information about the subdomain feature.
STATUSMicrosoft has confirmed this to be a problem in SNA Server for Windows NT. This problem was corrected in the latest SNA Server for Windows NT, 2.11 U.S. Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):
S E R V P A C K |
KBCategory: kbnetwork kbbug2.10 kbbug2.11
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