EMM386 Err Msg: Insufficient Memory for UMBs or Virtual HMA (98513)

The information in this article applies to:
    Microsoft MS-DOS operating system 6.0
    Microsoft MS-DOS operating system 6.2
    Microsoft MS-DOS operating system 6.21
    Microsoft MS-DOS operating system 6.22

This article was previously published under Q98513


If you are using an AMI or Phoenix BIOS, you may receive the following EMM386.EXE error message even though you have more than 384 kilobytes (K) of extended memory:

Insufficient memory for UMBs or virtual HMA


To work around this problem, modify your BIOS CMOS settings to disable "Fast A20 Gating." For more information, contact your hardware vendor.

NOTE: This message may also appear on systems with only 384K of extended memory if MS-DOS is loaded high. The solution is to exclude 64K from EMM386.EXE to accommodate loading MS-DOS high.

Modification Type: Major Last Reviewed: 11/20/1999
Keywords: KB98513