DISPLAY or CNOS Calls Fail with UNEXPECTED_DOS_ERROR (170289)
The information in this article applies to:
- Microsoft SNA Server 2.11 SP2
- Microsoft SNA Server 3.0
- Microsoft SNA Server 3.0 SP1
This article was previously published under Q170289 SYMPTOMS
When calling the DISPLAY or CNOS functions on Windows NT (over the SNA
Server Windows NT client software), these functions may eventually fail
with the following error:
primary_rc = 0xF011 (UNEXPECTED_DOS_ERROR)
secondary_rc = 593 (internal error - maximum routing procs defined)
NOTE: The 593 secondary return code is shown in decimal. This corresponds
to a hexadecimal value of 0x251, or in Intel dword format, 0x51020000.
CAUSE
This problem can occur when an APPC application calls WinAPPCStartup and
WinAPPCCleanup a number of times without being terminated. The APPC library
registers an internal routing procedure for each call to WinAPPCStartup,
but fails to deregister the routing procedure when the application calls
WinAPPCCleanup. This causes the internal routing procedure table to fill,
leading to the above error.
STATUS
Microsoft has confirmed this to be a problem in SNA Server versions
2.11 SP2, 3.0, and 3.0 SP1. This problem was corrected in the latest SNA
Server version 3.0 U.S. Service Pack. For information on obtaining this
Service Pack, query on the following word in the Microsoft Knowledge Base
(without the spaces):
| Modification Type: | Minor | Last Reviewed: | 7/16/2004 |
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| Keywords: | kbbug kbfix kbnetwork kbprogramming KB170289 |
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