Knowledge Base

SNA Server APPC Error: F004 AP_COMM_SUBSYSTEM_NOT_LOADED

Article ID: 148359

Article Last Modified on 2/11/2004


APPLIES TO


This article was previously published under Q148359

SYMPTOMS

When you attempt to start an SNA Server APPC Transaction Program (TP), the following error message appears:
Primary Return Code = F004 AP_COMM_SUBSYSTEM_NOT_LOADED
One or both the following secondary return codes also appear:
Secondary Return Code = 010000F0
Secondary Return code = 020000F0

CAUSE

The two secondary return codes appear due to the causes described below. The secondary return codes are documented on page 101 of the SNA Server APPC Programmer's Guide as X'F0000001' and X'F0000002' respectively. Intel processors store double-word values in byte inversed format. Therefore, an application may display the secondary return code as 0x010000F0 or 0x020000F0.

Secondary Return Code = 010000F0

This error occurs when the SNA Server client does not find any active SNA Servers running in the SNA Server domain or subdomain. If there are SNA Servers running, then this can also indicate that the SNA client is unable to receive a "sponsor" connection to an SNA Server in the domain. Specific causes of this problem include the following:

Secondary Return code = 020000F0

This error occurs if the local LU alias is not contained within the "LU_Alias" field of the TP_Started APPC verb. For example, if you do not enter a local LU Alias in the SNA Server 5250 Applet, do not default the User record with an appropriate local LU alias in SNA Server Admin Users and Groups window, or do not define the local APPC LU as a member of the default outgoing pool, this error occurs.

NOTE: If you use a CPIC application, the following CPIC error message and the "APPC error F004 020000F0" error message appear:
Error 20 (CM_PRODUCT_SPECIFIC_ERROR)
For additional information on Error 20 above, see the following article in the Microsoft Knowledge Base:

132720 SNA Server CPIC Allocate Error 20 (CM_PRODUCT_SPECIFIC_ERROR)


Additional query words: prodsna sp1

Keywords: kbnetwork KB148359