.NET Questions and Solutions

Symptoms
The Windows NT Event Viewer Application log may generate Event ID 1010 logs every two to three seconds. The event description is as follows:

Event ID:1010Source:PerflibDescription:The Collect Procedure for the “SnaServr” service in DLL”C:\SNA\system\snaperf.dll” generated anexception or returnedan invalid status. Performance data returned by counter DLL will be notbe returned in Perf Data Block. Exception or status code returned isDWORD 0. Other related events descriptions that may follow are:

Event ID:1008Source:PerflibDescription:The Open Procedure for service “Tcpip” in DLL “Perfctrs.dll” failed.Performance data for this service will not be available. Status codereturned is DWORD 0.Event ID:1011Source:PerflibDescription:The library file “tapiperf.dll” specified for the “TapiSrv” servicecould notbe opened. Performance data for this service will not beavailable.Status code is data DWORD 0.Event ID:4005Source:perfctrsDescription:Load of INETMIB1.DLL failed. Make sure the DLL file is in the PATH.WIN32 Error number is returned in the data.
Resolution
It has been confirmed that versions earlier than version 3.5 of Compaq’s Insight Manager (CIM) conflict with Performance Counters, thereby causing these errors to occur.

Symptoms
The SNA Server stops responding (hangs) and Appletalk client computers areunable to attain session connections. In the Event Viewer, the followingapplication events appear:

Event ID: 624
Source: SNADUMP.LOG
Description: A process SNABASE.EXE ended abnormally due to a protectionviolation, or similar condition.
Event ID: 4097
Source: Dr. Watson Log
This application, SNABASE.DBG generated an applicaiton error. The error
occurred on <date>. The exception generated was C0000005 at address <address>.A portion of the DRWTSN32.LOG file states the following:

App: snabase.DBG (pid=160)When: <date> @ <time>Exception number: c0000005 (access violation) NOTE: Your DRWTSN32.LOG file will appear somewhat different than thisexample.
Resolution
The SNAAT.DLL send routine is not checking to see if the L-Table is alreadyin a closing state. Therefore, it tries to access its pending queue, whichhas been released. This causes the application exception in SNABASE.EXE.