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Q249816: APPC App Fails with Primary RC = F004, Secondary RC = 00000000

Article: Q249816
Product(s): Microsoft SNA Server
Version(s): WINDOWS:3.0 (all SP),4.0,4.0 SP1,4.0 SP2,4.0 SP3
Operating System(s): 
Keyword(s): 
Last Modified: 13-JUN-2001

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The information in this article applies to:

- Microsoft SNA Server, versions 3.0 SP1, 3.0 SP2, 3.0 SP3, 3.0 SP4, 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3 
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SYMPTOMS
========

On the TP_STARTED call, an APPC application may fail and the following error
message may occur:

  Primary Return Code = F004 (AP_COMM_SUBSYSTEM_NOT_LOADED)
  Secondary Return Code = 00000000 (no applicable subcode)

The APPC Programmer's Guide in the online SDK documentation describes the F004
error as follows:

  A required component could not be loaded or has terminated while processing
  the verb. Thus, communication could not take place. Contact the system
  administrator for corrective action.

CAUSE
=====

This error can be caused by the application calling an incorrect version of the
Wappc32.dll file. This file is installed with SNA Server in the Sna\System
directory.

RESOLUTION
==========

If there is a duplicate Wappc32.dll file on the computer in the \WINNT\System32
directory for example, delete or rename it.

MORE INFORMATION
================

In one customer instance, there were two versions of the Wappc32.dll file on the
system because the IBM version was installed in the \WINNT\System32 directory
when the customer installed the IBM emulator program.

Note: There are other issues that can cause the F004 error with different
secondary return codes. For additional information, click the article numbers
below to view the articles in the Microsoft Knowledge Base:

  Q148359 SNA Server APPC Error: F004 AP_COMM_SUBSYSTEM_NOT_LOADED

  Q150841 Troubleshooting Common APPC Error Codes

The third-party products discussed in this article are manufactured by vendors
independent of Microsoft; we make no warranty, implied or otherwise, regarding
these products' performance or reliability.

Additional query words:

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Keywords          :  
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ400 kbSNAServ300SP3 kbSNAServ300SP1 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 kbSNAServ300SP2 kbSNAServ300SP4
Version           : WINDOWS:3.0 (all SP),4.0,4.0 SP1,4.0 SP2,4.0 SP3

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