Unable to deploy custom adapter module in PI 7.31

Hi pros,

I created a custom adapter module to split some complex input files to multiple messages. We use a SAP PO 7.31 java-only installation. I followed this document to create my adapter module:

How to Create Modules for the JEE Adapter Engine

I know it is for PI 7.1 but a colleague of mine said that he was able to create a running adapter module for PI 7.3 following the guide. I created the following projects:

EAR project references the EJB project:

Project facet of the EJBproject:

ejb-jar.xml config:

application-j2ee-engine.xml (in EAR project):

When I try to deploy my module, I get the following error:

Java version:

NWDS version:

Any hint is appreciated! What can be wrong? What can I check again?

THANKS!

Message was edited by: Stefan Münchow