System Hangs with dBase III 1.0 or III+ 1.0 (78410)

The information in this article applies to:
    Microsoft MS-DOS operating system 5.0
    Microsoft MS-DOS operating system 5.0a
    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 Q78410


Borland/Ashton-Tate has confirmed that dBase III version 1.0 and dBase III+ version 1.0 may cause your system to stop responding (hang) if HIMEM.SYS is installed.


dBase III 1.0 and III+ 1.0 include a feature called SuperLock that conflicts with HIMEM.SYS. According to Borland/Ashton-Tate, SuperLock is a copy-protection feature that allows you to install dBase III 1.0 and III+ 1.0 only once to a hard drive.


Adding the /CPUCLOCK:ON switch to the HIMEM.SYS line in your CONFIG.SYS file may resolve this conflict. If you are using dBase III or III+, add the following line to your CONFIG.SYS file
   device=[drive]:\[dir]\himem.sys /cpuclock:on
where "[drive]" and "[dir]" indicate the location of the HIMEM.SYS driver.

The /CPUCLOCK:ON switch slows HIMEM.SYS, allowing it to wait longer for signals. This affects the speed of HIMEM.SYS, but not the system clock speed. Early versions of dBase were written for slower machines.


For more information, contact Borland/Ashton-Tate technical support.

The products included here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Modification Type: Major Last Reviewed: 5/12/2003
Keywords: KB78410