For Unix/Linux Platforms Only

This issue is probably due to locale configuration. Check the output of the command 'locale'. This will list your current locale settings. The output will look something like:

LANG="C"
LC_CTYPE="C"
LC_TIME="C"
...
LC_ALL="C"

It is necessary to set this (in particular, the LC_CTYPE value) to an 8-bit system locale. First, check the locale categories available on your system, using the command

This will produce a full list of installed locales. For your forms, you will need to use one of the locales from this list. Alternatively you will have to install a new locale onto your machine.

For example, if you are looking for a Spanish locale, then 'es_ES' and 'es_ES.ISO8859-1' are examples of possible locales you would choose. Avoid locales of the form es_es, as these are 7-bit.

Once you have selected an appropriate locale category, apply this to your environment.

LC_ALL=es_ES.ISO8859-1
export LC_ALL

or, if you just want to set LC_CTYPE

LC_ALL=""
export LC_ALL
LC_CTYPE=es_ES.ISO8859-1
export LC_CTYPE