Hi, Since I am not supposed to change the code in the files I received, as a last resort I am creating soft links. Take your suggestion. "MYHEADER.H" becomes "myheader.h". In some of the programs(files) user might be including like

#include <MYHEADER.H>
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Then I will get the error that MYHEADER.H is missing. So renaming will not work here as you suggested as I should not change code in the files. Many times I found user including like:

#include <Myheader.h>
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In this case also your suggestion will not work. So I was forced to create soft links. First of all I do not know how to find a file with the same name but in different case in perl. I think I am clear to you. Thanks Ashok