Maybe something sets or resets $/.

Note that your code never can go into the if( $flag == 0 ) branch with the code as you show it. Maybe you want to add some debugging statements using warn. Your code can only one get into the $flag==0 branch.

I can only recommend reducing your code so that you produce a small, self-contained program (20 lines or so) that still has the problematic behaviour.

In reply to Re^3: Problem with appending files by Corion
in thread Problem with appending files by ravi45722

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