Win32 CPIC Application May Stop Unexpectedly

ID: Q248498

The information in this article applies to:

Microsoft SNA Server, versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3

SYMPTOMS

If a Win32 CPIC application is supporting multiple conversations using non-blocking mode, the application may stop unexpectedly while issuing a new CMINIT (Initialize_Conversation).

CAUSE

Under certain circumstances, the Win32 CPIC and APPC libraries can get into a deadlock condition. Note that the CPIC library (Wcpic32.dll) communicates through the APPC library (Wappc32.dll). The deadlock can occur when CMINIT issues a TP_STARTED while holding an internal CPIC critical section. If another APPC verb completes asynchronously while the TP_STARTED is running, the CPIC application may deadlock.

RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Microsoft SNA Server version 4.0 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

The English version of this fix should have the following file attributes or later:

File name	Date	Time
Wcpic32.dll	12/13/99	12:00p

NOTE: Because of file dependencies, the most recent fix that contains the above files may also contain additional files.

STATUS

Microsoft has confirmed this to be a problem in Microsoft SNA Server version 4.0, 4.0 SP1, 4.0 SP2 and 4.0 SP3.

Additional query words:

Keywords :
Version : WINDOWS:4.0,4.0 SP1,4.0 SP2,4.0 SP3
Platform : WINDOWS
Issue type : kbbug