` Chain in XP (Ramon Reed ) - Icetips Article
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Par2: Chain in XP
2003-02-20 -- Ramon Reed
 
That one about drove me nuts until I found the answer. Truth is, the error message is misleading - memory's not the problem, it's the DOS environment space, because CHAIN.COM requires something like 1200 or so free bytes in the environment. This was easy to fix in earlier "DOS bassed" versions of windows with the SHELL command in CONFIG.SYS, but I haven't found how to increase the environment size in XP. But, there is another solution: To see the problem, go the the command prompt, and type SET . Can you believe all the crap XP has put in there??!! So, what I do is start my DOS programs with a batch file which _first_ clears out most of those XP environment variables ("SET variablename=" will do it), then run my program with CHAIN, and finally re-set the stuff after the program closes. This may not be the most elegant solution, but it's easy enough to do and works for me.

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