After turning ann CallIns and providing env variables it worked!

There are a few more, the whole set:

## Embedded Python environment

ENV IRISUSERNAME "_SYSTEM"

ENV IRISPASSWORD "SYS"

ENV IRISNAMESPACE "USER"

ENV PYTHON_PATH=/usr/irissys/bin/

ENV PATH "/usr/irissys/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/home/irisowner/bin"

@Guillaume Rongier , correct me if I'm wrong (tooked from your code).

We need a oneliner or zpm to start callins ) It becomes important!