Bareword found where operator expected at d:\admin\perl\scripts\stundenreadings.pl line 55, near "push @errors, "File"
  (Might be a runaway multi-line "" string starting on line 51)
        (Do you need to predeclare push?)
String found where operator expected at d:\admin\perl\scripts\stundenreadings.pl line 55, near "File '$file'"
        (Do you need to predeclare File?)
Bareword found where operator expected at d:\admin\perl\scripts\stundenreadings.pl line 55, near "'$file' konnte"
        (Missing operator before konnte?)
syntax error at d:\admin\perl\scripts\stundenreadings.pl line 55, near "push @errors, "File "
Unrecognized character \xF6 at d:\admin\perl\scripts\stundenreadings.pl line 55.