DOCUMENT:Q74454 17-DEC-2000 [msdos] TITLE :MS-DOS Shell and the Colorado Tape Backup System PRODUCT :Microsoft Disk Operating System PROD/VER:MS-DOS:5.x,6.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft MS-DOS operating system versions 5.0, 5.0a, 6.0 ------------------------------------------------------------------------------- SYMPTOMS ======== You have a Colorado Tape Backup on your system, and when you try to exit a program that has been run from MS-DOS Shell, you receive an error message similar to one of the following: Unable to Load MS-DOS Shell -or- Unable to Unload MS-DOS Shell If you choose the RETRY button you are returned to MS-DOS Shell. If you choose the NO button, you are returned to the MS-DOS command prompt. CAUSE ===== According to Colorado Memory Systems, when you load the automatic backup program from the AUTOEXEC.BAT file, it causes a memory conflict with Shell. If its automatic tape backup program is loaded from the AUTOEXEC.BAT file, it does not leave enough memory for Shell to operate properly. WORKAROUND ========== A workaround for this problem is to load the automatic tape backup program from the MS-DOS command prompt, instead of the AUTOEXEC.BAT file. MORE INFORMATION ================ The product included here is manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this products' performance or reliability. Additional query words: 5.00 6.00 ====================================================================== Keywords : Technology : kbMSDOSSearch kbMSDOS600 kbMSDOS500 kbMSDOS500a Version : MS-DOS:5.x,6.0 ============================================================================= 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 2000.