DOCUMENT:Q293879 08-MAY-2002 [sna] TITLE :"Unable to Write File" Error After Changing Com.cfg PRODUCT :Microsoft SNA Server PROD/VER::4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4 OPER/SYS: KEYWORDS:kbDSupport sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbhis2000 kbsna400sp4 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, 4.0 SP4 - Microsoft Host Integration Server 2000 ------------------------------------------------------------------------------- SYMPTOMS ======== Attempting to save an SNA Server or Host Integration Server 2000 configuration file (Com.cfg) after making a configuration change results in an "Unable to write file" error. The configuration changes that were made are not saved in the configuration. CAUSE ===== If the addition of a new APPC mode causes the amount of memory needed to store APPC mode records to exceed 64 KB in the SNA Server/Host Integration Server 2000 configuration file, a calculation is done to resize the amount of memory needed. This calculation is being done incorrectly, which prevents the addition of more APPC mode definitions. RESOLUTION ========== SNA Server 4.0 -------------- A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. This fix may receive additional testing at a later time, to further ensure product quality. Therefore, if you are not severely affected by this 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 about support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix should have the following file attributes or later: +-----------------------------------+ | File name | Date | Time | +-----------------------------------+ | Snacfg.dll | 03/21/2001 | 05:34PM | +-----------------------------------+ NOTE: Because of file dependencies, the most recent fix that contains the above files may also contain additional files. Host Integration Server 2000 ---------------------------- No fix is yet available for this problem in Host Integration Server 2000. STATUS ====== SNA Server 4.0 -------------- Microsoft has confirmed this to be a problem in Microsoft SNA Server versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, 4.0 SP4. Host Integration Server 2000 ---------------------------- Microsoft has confirmed this to be a problem in Microsoft Host Integration Server 2000. MORE INFORMATION ================ The problem described in this article may occur when you are making any number of configuration changes if the SNA Server or Host Integration Server 2000 configuration file contains a large number of objects. However, the number of objects at which this problem may occur cannot be provided here because it depends on various other configuration variables. The following are examples of two scenarios that result in the "Unable to write file" error: - Adding new APPC Mode definitions to the SNA Server/Host Integration Server 2000 configuration. - Assigning existing LUA (logical unit application) LUs to existing LUA pools. NOTES: In this case, no new objects were added to the SNA Server/Integration Server 2000 configuration. The error occurs because the new association created by assigning the LUA LUs to the LU pools required additional memory to store the objects. For additional information on another problem that can cause an "Unable to write file" error when you save an SNA configuration file, click the article number below to view the article in the Microsoft Knowledge Base: Q314973 "Unable to Write File" Error Message Is Displayed After You Add Local APPC LU Additional query words: ====================================================================== Keywords : kbDSupport sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbhis2000 kbsna400sp4 Technology : kbAudDeveloper kbSNAServSearch kbHostIntegServ2000 kbSNAServ400 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 kbSNAServ400SP4 Version : :4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.