The error you recieve will look something like this:
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.iso885915"
are supported and installed on your system.
For your system the LANG variable reported above will respond to what is in /etc/sysconfig/i18n. Do the following to fix this:
echo "en_US.iso885915 en_US" >> /home/virtual/FILESYSTEMTEMPLATE/siteinfo/usr/share/locale/locale.alias
This has been fixed in Ensim Pro/Basic 3.5.15 and above.