A CPI-C Application May Hang When Internal Tracing is Enabled

ID: Q235858

The information in this article applies to:

SYMPTOMS

If client internal tracing is enabled using the SNA Server trace facility, a CPI-C application may stop responding (hang). This only happens if asynchronous verb completion is used in the application.


CAUSE

A CPI-C verb is traced after the asynchronous completion of the verb is signaled. In this situation, the application has legitimately freed the data buffer, which is still traced.


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 Date Time
Wcpic32.dll 03/08/99 2:01 PM

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

NOTE: If this product was already installed on your computer when you purchased it from the Original Equipment Manufacturer (OEM) and you need this fix, please call the Pay Per Incident number listed on the above Web site. If you contact Microsoft to obtain this fix, and if it is determined that you only require the fix you requested, no fee will be charged. However, if you request additional technical support, and if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support, you may be charged a non-refundable fee.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:
Q154871 Determining If You Are Eligible for No-Charge Technical Support


STATUS

Microsoft has confirmed this to be a problem in Microsoft SNA Server, versions 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3, 3.0 SP4, 4.0, 4.0 SP1, 4.0 SP2.

Additional query words: cpic 


Keywords          : sna3 sna3sp1 sna3sp2 sna3sp3 sna3sp4 sna4 sna4sp1 sna4sp2 
Version           : WINDOWS:3.0,3.0SP1,3.0SP2,3.0SP3,3.0SP4,4.0,4.0SP1,4.0SP2
Platform          : WINDOWS 
Issue type        : kbbug

Last Reviewed: June 28, 1999