.NET Questions and Solutions

Symptoms
An application exception (trap) may occur on the SNA Server computer when you use the Rumba 5.2 TN5250 client to connect to the TN5250 Service. If you have Dr. Watson (Drwtsn32.exe) configured as the default debugger, a Drwtsn32.log file is created in the [NTROOT] directory. The following events are created in the Application event log of the Event Viewer:

Event ID: 5
Source : SNA TN5250 ServerDescription:
The SNA TN5250 Service detected an internal error.
File = ..\shared\tn5tnspm.c
Line = 3477
Fail = ((NB_IPS *)dsi5_data)->buf_size >= ((NB_IPS *)dsi5_data)->ips_length
Parm = 0×0
Event ID: 4097
Source: DrWatson
The application, exe\tn5250.dbg, generated an application error The error occurred on1/25/2000 @ 20:58: 3.406.
The exception generated was 80000003 at address 77f76274 (DbgBreakPoint).The following is an example of the exception in DbgBreakPoint:

Application exception occurred:App: exe\tn5250.dbg (pid=326)When: 1/25/2000 @ 20:58:3.406Exception number: 80000003 (hardcoded breakpoint)function: DbgBreakPointFAULT ->77f76274 ccint377f76275 c3ret77f76276 8bc0moveax,eax
Resolution
To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
215838?(http://support.microsoft.com/kb/215838/EN-US/) How to Obtain the Latest SNA Server Version 4.0 Service Pack

Symptoms
An SNA Server computer using SNARAS may experience an application exceptionin Rasman.exe in function SnaRasUnbind() after successfully opening andclosing a number of SNARAS connections in succession.
An entry similar to the following will be written to a Drwtsn32.log file inthe Windows NT directory when the application exception occurs:

Application exception occurred:App: exe\rasman.dbg (<process id>)When: <date> @ <time>Exception number: c0000005 (access violation)<data omitted>function: SnaRasUnbind<data omitted>FAULT ->63701c81 8b7604mov esi,[esi+0x4]ds:014bfa0e=????????<data omitted> In one reported instance of this problem, the application exceptionoccurred after 20 to 30 SNA Server SNARAS connections were opened and thenclosed in succession. Each connection was established to download filesfrom a remote system and was closed after the files were downloaded.
Resolution
The application exception is caused when SNARAS attempts to access memorythat has been released.