This issue is likely due to a design error that causes the application to fail to verify the existance of a file before writing to it.

This isn't an error, and is easily avoidable, with two different methods, like this:

if (-e '/path/to/somefile') #method one (perldoc -f -X)
{
  #method two (die statements, see perldoc -f open)
  open(OUTFILE, ">>/path/to/somefile") or die "can't open file: $!";
  #or
  open(INFILE, "/path/to/somefile") or die "can't open file: $!";
}
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Update: Added reference to filetest (-X) perldoc