set_change_event(bool implemented, bool detect = true);

where implemented=true indicates that events are pushed manually from the code and detect=true (when used) triggers the verification of the same event properties as for events send by the polling thread. When setting detect=false, no value checking is done on the pushed value

What did you put as Absolute Change and/or Relative Change criteria in the code?

try
{
	a = new DynamicFINSAttribute(cfg);
	a->set_disp_level(Tango::OPERATOR);

	Tango::UserDefaultAttrProp event_prop;
	event_prop.set_event_abs_change("1");

	//- set other attribute properties : label, display format,…
	a->set_default_properties(event_prop);
	a->set_change_event(true, true);

	this->m_dyn_attrs.add(a); 

	return;
}
catch (std::bad_alloc)
{
	ERROR_STREAM << "TOmronServer::add_dynamic_attribute caught bad_alloc" << std::endl;
}
catch (Tango::DevFailed &e)
{
	ERROR_STREAM << "TOmronServer::add_dynamic_attribute caught DevFailed " << e << std::endl;
}
catch (…)
{
	ERROR_STREAM << "TOmronServer::add_dynamic_attribute caught (…)" << std::endl;
}

Did you configure these criteria in the database as well in your case #1?

What is the type of your attribute? Is it Read/Only or Read/Write?

Are you testing with the exact same device server code in both cases?

Can you publish a sample of code which triggers the problem in your case?

Are you using localhost in your device definition?

This might be what you are observing?

Desc: * attribute not found
Origin: MultiAttribute::get_attr_ind_by_name

.Tango exception
Severity = ERROR
Error reason = API_CorbaException
Desc : UNKNOWN CORBA system exception
Origin : Connection::command_inout()

Tango exception
Severity = ERROR
Error reason = API_CommunicationFailed
Desc : Failed to execute command_inout on device dserver/tomronserver/area1, command ZmqEventSubscriptionChange
Origin : Connection::command_inout()

Tango exception
Severity = ERROR
Error reason = API_DSFailedRegisteringEvent
Desc : Device server send exception while trying to register event
Origin : EventConsumer::connect_event()

Attachments: 12Kb