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  1. or download this
    use warnings;
use strict;

...

openFile('$ENV{APPDATA}/WaterAccount/file.log');
openFile("$ENV{APPDATA}/WaterAccount/file.log");
  2. or download this
    C:\Users\OWNER\Documents\Work\Perl>perl file.pl
Unrecognized escape \S passed through at file.pl line 22.
Unrecognized escape \A passed through at file.pl line 22.
...
failed to open $ENV{APPDATA}/WaterAccount/file.log No such file or dir
+ectory
failed to open C:\Users\OWNER\AppData\Roaming/WaterAccount/file.log No
+ such file
 or directory