# Issue
A command which includes the katakana letter "ク" cannot be run.
This issue does not occur with a command which includes other non single-byte characters such as "あ", "漢" and "😃".
# Reproducible test case
```
# run the following command
parallel echo ク ::: some words
## expected output were as:
# ク some
# ク words
## but the actual output will be as:
# parallel: Error: Command cannot contain the character �. Use a function for that.
```
# Version
$ parallel --version
GNU parallel 20170522
# Link
Unicode Character 'KATAKANA LETTER KU' (U+30AF):
http://www.fileformat.info/info/unicode/char/30af/index.htm