The problem was that the server .exe name has an ending with "64". I have copied the slave executable to StandardERPServer64-Slave and it looks the main exe is trying to start the slave, but cannot. It's the same problem we have faced a few months ago (Slave exe thinks there is no RAM):


2018-04-30 08:52:27 Application shutdown properly...
2018-04-30 12:00:33 (-1) database cache may be max 80% of physical RAM (physical
RAM is: 0bytes, attempted to use: 100000bytes for DB cache)
2018-04-30 12:00:33 (-1) Exit


It may be related to our virtual server (Centos 7) configuration I guess, because the gateway runs on the Centos 7 on another virtual server.
Any more ideas?