Hi Michiel, currently there is no straightforward way to get an IDms object in the IGQIOnInit method. However, by creating a class that implements the ICommunication interface, based on the GQIDMS you can get close. Unfortunately the GQIDMS object lacks methods to use subscriptions, so it could be that certain functionality doesn't work.

public class DataSource : IGQIOnInit
{
public OnInitOutputArgs OnInit(OnInitInputArgs args)
{
var dms = DmsFactory.CreateDms(new GqiConnection(args.DMS));

}

}

public class GqiConnection : ICommunication
{
private readonly GQIDMS _gqiDms;

public GqiConnection(GQIDMS gqiDms)
{
_gqiDms = gqiDms ?? throw new ArgumentNullException(nameof(gqiDms));
}

public DMSMessage[] SendMessage(DMSMessage message)
{
return new[] { _gqiDms.SendMessage(message) };
}

public DMSMessage SendSingleResponseMessage(DMSMessage message)
{
return _gqiDms.SendMessage(message);
}

public DMSMessage SendSingleRawResponseMessage(DMSMessage message)
{
return _gqiDms.SendMessage(message);
}

public void AddSubscriptionHandler(NewMessageEventHandler handler)
{
throw new NotImplementedException();
}

public void AddSubscriptions(NewMessageEventHandler handler, string handleGuid, SubscriptionFilter[] subscriptions)
{
throw new NotImplementedException();
}

public void ClearSubscriptionHandler(NewMessageEventHandler handler)
{
throw new NotImplementedException();
}

public void ClearSubscriptions(NewMessageEventHandler handler, string handleGuid, bool replaceWithEmpty = false)
{
throw new NotImplementedException();
}
}