Article ID: 106276
Article Last Modified on 10/6/1999
APPLIES TO
- Microsoft Windows for Workgroups 3.11
This article was previously published under Q106276
SYMPTOMS
If you enable 32-bit file access and you use the MS-DOS substitute command (SUBST), one of the following symptoms occurs when you start your system:
- Your system stops responding (hangs) at a black screen after displaying the Windows for Workgroups logo.
-or- - You receive the following error message:
CAUSE
The SUBST utility from MS-DOS allows you to substitute drive letters for directory names. This method of redirection is incompatible with 32-bit file access. When IFSMGR.386 detects SUBST, it prevents 32-bit file access from loading to protect against data loss.
IMPORTANT: It is important to note that 32-bit file access is disabled for all drives, not just the substituted drive.
RESOLUTION
This error message is by design.
If you use 32-bit file access, you cannot use the SUBST command. To use the SUBST command, you must first disable 32-bit file access.
Note that the following message is displayed if SUBST is used in an MS-DOS virtual machine (VM) with 32-bit file access enabled:
This error message appears regardless of whether you are using a stand- alone machine or one on a network.
Additional query words: 3.11 vfat 32-bit blue screen
Keywords: KB106276
