No subject

- utf8 support which in the standard is not supported. You have do
disable the error checks. checksum could be badly processed in that case
i think.
- translations have to be hardcoded for server strings and date
strings... Which is quite annoying
- Bad dates on renewals when renewal is done (the duedate sticks)
and that's it.

What could be done would be to rework the C4::SIP in order to be more
compliant to the License (it was first written with evergreen iirc) and
to share more with openncip (openncip.org), where the software originated.

all in all, it works pretty good, with 3M, Nedap or IntellIdent self
checkout appliances.

Hope that helps.
-- 
Henri-Damien LAURENT
BibLibre