EAL4C master/slave position command error

Hi,
I have a problem with the eal4c library (code developed in c++ on ubuntu 16.0), I have done the setup of two linear actuators in order to have the master and slave configuration, with the position control feedback for the slave, but If I try to move the actuator with the C++ application, using the ealMotionMovementMoveAbsolute() function, it returns the error "General error during function call".

If I de-activate the cross-communication and put the MLD to STOP, so I use only one axis the same code runs without problem. Do you know if I need to special connection setup or I need to write specific parameters to get the motion in the master/slave configuration?

the connection and the motion are performed with these functions:
handle = ealCreateDeviceHandle(false)
ealConnectionDefault(&handle, "master device IP")
ealMotionMovementPower(&handle, 0, true)
ealMotionMovementMoveAbsolute(&handle, 0, 0, 100, 100, 100, 0)

the MLD setup for master/slave setup is done following the guide in attachment.

thanks in advance, 

Andrea