Adabas-ce connection from natural-ce problem

Hello, I am playing with the community versions of Natural and Adabas.

I have managed to get everything working by invoking Natural programs from NaturalONE, pointing to the Natural server in the Natural container.

I was able to create a file in the Adabas container, load records into it, write a DDM, and create a program that uses it from the NaturalONE IDE. I can successfully query the data loaded into the file.

What I cannot do is execute that same program (uploaded before form NaturalONE) from within the Natural container instead of from NaturalONE. That is, using the Natural environment shell, selecting the library and the program, and running it. I get this error:

xxx 0046 NAT3148 Database 12 not active. Subc 0.
xxx 0013 NAT3148 Database 12 not active. Subc 0.

Is there anything else I need to configure to be able to run it manually from the Natural environment shell inside the Natural container?

Versions:
softwareag/adabas-ce:7.3.0
softwareag/natural-ce:9.3.2

(As a comment, I am able to successfully connect Adabas Manager to database 12 in the Adabas container using adabas-db:8190 and browse it)

thanks.
Martin