A simplification of your code will fix it, 

while(<MYFILE>){
    s/ORA3=\w+/ORA3=0/;
    print COPYFILE $_;
}

[download]
The space in your match was hurting you.

And then there is always the command-line edit-in-place version: $ perl -pi -e's/ORA3=\w+/ORA3=0/' file

After Compline,
Zaxo

In reply to Re: manpulating a file by Zaxo
in thread minpulating a file by Jaki1980

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