PI Error when integration with Boomi

Dear all,

We are implementing EC replication and we have manage to stablish the connection between the following environments:

EC <-> Boomi <-> SAP PI <-> SAP HCM

We can now send an employee and receive back the communication message.

However although in Boomi all looks fine, in PI there is a message being received as per the image: "Premature end of file".

In Boomi, I can only see the following warning as I do not see anything else being send back....

Since this is a package integration, does anyone knows at this error means?

Could this be the route cause?

Many thanks in advance,

Kind regards,

Helder Rodrigues