DOS Error 4 appeared when you running dos aplication in Windows XP that’s created by Clipper Summer 87 and Clipper 5x. To fix this message “DOS Error 4″, I use this command:
set clipper=f(number)
set clipper=f100 you can type number as you want.
I don’t modify from config.nt or autoexec.nt but I create one bath file. for example you have dos aplication called “stock.exe” that created by clipper summer 87 or clipper 5x. Create a batch file called ex: runstock.bat, content of the file:
@echo off
set clipper=f100
I have tested and It worked! My Windows XP working like Full DOS Support because I have fixed too Dos Printing Problem and make it faster, usually when we print dos application in Windows XP there are 15 second delay after the print job finish. After fixed this, I can print like working in Windows 98 or DOS that’s no delay, of course using LPT printing port.
